Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3930e037d72344…

MALICIOUS

PDF

92.7 KB Created: 2021-06-30 01:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0bfac9e689163701d636ec39160e1618 SHA-1: c692d4ef117bb605da986428a262f091c67f6146 SHA-256: 4e3930e037d72344949ccf8651ca8996133f38b7a7ffc314e2ed9f736c3f4fe3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDF files hosted on various domains, likely serving as lures for phishing or malware distribution. The document body is heavily obfuscated and unreadable, suggesting it's not intended for direct user interaction but rather to exploit PDF vulnerabilities or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crysiq.ru/uplcv?utm_term=cheapest+way+to+ship+luggage PDF link annotation
    • http://mispuntossaga.com/campannas/file/budezibe.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/pelixala.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/de87bc5fb4c7340c5d16669f6400542a/9330063517.pdfIn PDF document text
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/dilixoweroxuvulikufoz.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/e69f194663f97f3c60f708406ef89931/seratufuti.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/b0da9207545efde71f24bf36a7504c95/21783116455.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/1egjdfrsk7ka3f3ncb9js7fkq4/29774257858.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/segero.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b5c85112d---36793633009.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160829c48e4c9c---ruruvojowaradukixebagaf.pdfIn PDF document text
    • https://pestresolution.pt/site/upload/file/9061635908.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/39692445814.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fab753fa8---zedipugiweliwuvami.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/d6327d5b895b61744234ec698fb3b67d/sosaj.pdfIn PDF document text
    • https://aduanaldelvalle.mx/userfiles/file/88952429419.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f04eb14a67---tusijawasomokatu.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082d6b7818f9---21421068458.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d29617afc---22528896631.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bf82b68db---71348866046.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/90cff660957953ed577d6228e0a12525/43807584120.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/mazewevevatus.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160909ab237927---98281031481.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/52727219774.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c873e93310d---zatanaveludipuvoxijen.pdfIn PDF document text
    • https://avenue102.com/uploads/file/pazoxofofunora.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c1057a1bb3b---82101657500.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001085c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001206e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206E 16932 bytes
SHA-256: 1171698e3ca939aa570dd9bd4e99e9fcab2ca1e6877b2d1f1e858c78ea004b1a
font_02_sfnt_off00014c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C94 10660 bytes
SHA-256: 2df7848e693e40a202af4b792c76a1b25d806d8b2b5356682711e5dc2ecc25e8

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