Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7107ef39ef0efa…

MALICIOUS

PDF

73.1 KB Created: 2021-07-20 06:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 24d9b79302967d36efd445a12837e454 SHA-1: 4f62403255814b314722270f705b26737e5979ac SHA-256: ed7107ef39ef0efaea193044556bac1127d5a294cc64f0956f3e021b849961c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://chronicles.ae/userfiles/files/dojisivubafefew.pdf In PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/d1c62534a7618de7175adaa126ea4436/25341334127.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/tasumuximawisuzuzexe.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/276pvn2ihe6lk92bg4rn1h3n0k/15841737233.pdfIn PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/rebenuruguzojetodubu.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/vitorasa.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/5d9c4d9e56ac358883612584deacc62a/55195784984.pdfIn PDF document text
    • http://www.heksan.com.pl/file/60011620699.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ba19971bb6e---welokeresetifufito.pdfIn PDF document text
    • http://vhshf.de/File/33974690124.pdfIn PDF document text
    • http://piau-po21inn.com/CKEdit/upload/files/61647230327.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/fnjmhesafu8c3b214ku30ms390/xidetulurojodogi.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/34619268077.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/todekowivokirufevekazu.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/2d651a5222a8f283129ea5c57a6f7bc7/31137178048.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817072eed84---xokezedezo.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/64709206280.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/24053426775.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/sufumibuwowoxufizudun.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608506675aeac---zewuwiwadijosexuz.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ub4ibp6620g8849u2ohgbbv01n/sivelekeka.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/0dc32d53cf65c6b6d3ea238e432953ec/tevajerikowi.pdfIn PDF document text
    • http://coffee33.ru/archive/file/vilaxigolubofuvi.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/wewojaga.pdfIn PDF document text
    • http://sequoia59.com/clients/867919/File/paxasekis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=all+right+angles+are+equalPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD3 16040 bytes
SHA-256: 0529578d71884d678e9078ff3b6fc78f02b87e2567b2529907cbf519e2cb41a1
font_01_sfnt_off0000e75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75B 10492 bytes
SHA-256: fe666090bdebcfa6fe22eacfbe57f72b88d79f202007cf505083f9aeee75ce25
font_02_sfnt_off0000fed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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