Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f29895f8edbcef7…

MALICIOUS

PDF

95.3 KB Created: 2021-08-16 23:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: ce796ec3f8ff22c1e144a9ce1460f2fb SHA-1: b5a292b5ae73cdea2b6361808a1d006bcb593e30 SHA-256: 2f29895f8edbcef7b220c34cbe34ba036c261a3bdd8909e0d6d7f3635b2ca645
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of these links indicates a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=rimworld+combat+extended+no+ammo PDF link annotation
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbefa5b40f---13530909206.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16100fdd862a68---52681256822.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085cdabe7856---31438239809.pdfIn PDF document text
    • https://5udua.com/contents/files/60949379975.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/93759714a4f310172bdc60372bd69bd6/zagozebosuvowomefa.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/badimoxuva.pdfIn PDF document text
    • http://gotween.com/userfiles/file///juroboludapovufuvoji.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160de9dafc8746---vulezumufiminaliw.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/natemekumimomuxevelipad.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/gurolemudu.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/pm0lct510tjtc32m6b5dkroru0/jopamidaba.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/4229010860.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/c5b0a99f534b94b5301066b3986e7f6f/lufepujo.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/civoqa6r0nplvpoqc9af3drob0/94684938703.pdfIn PDF document text
    • http://flexa.cz/docs/file/59831664254.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/41466566319.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/09688f5af7b8653b118bcc5f510ba5bd/vawuwaroxutajuvidorejube.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc315c7bb0---sesiniv.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/gk416gfr3kme6d0ortdrphrtj1/mifinafome.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/50412598689.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/45845621223.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c4e13d3ea---25990937360.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b20e6e0d4de---xasizowegonadiduwusu.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/021406364782.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_off00010932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10932 10736 bytes
SHA-256: bdc170af321a3bba46989d7bf1f5dcb5fc5fe5d7ed5d4176d2bee9cbdd490921
font_01_sfnt_off000121e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E7 19724 bytes
SHA-256: a5d11b82a9b96bc78294dac144d7fd71dd7b04220c9939b22d7328b444e414d0
font_02_sfnt_off0001553f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1553F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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