Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7da6352f1f9e59d…

MALICIOUS

PDF

77.1 KB Created: 2021-02-06 10:07:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f704bfcceb05468827be97cbf5443684 SHA-1: f4ccf9331444f295dd1df6737a59c647f8625768 SHA-256: e7da6352f1f9e59defcf9b74ddc33a9edf4c89b4385656419f2eb54c01a3c814
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/aws?utm_term=adobe+after+effects+cs3+plugins+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4498883/normal_5fe7f33d4943a.pdfIn PDF document text
    • https://cdn.sqhk.co/fopalixogul/PKOrNhf/tamil_image_editor_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/j90LkLY/catfish_bait_homemade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471481/normal_5fc5bde7de096.pdfIn PDF document text
    • http://dvestideyli.xyz/33707109707ort83.pdfIn PDF document text
    • http://universityru.fun/13182858426kebqq.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/hangout_app_for_android_phone7u2pq.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/bhfoJgd/801001656.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/i2jfhdU/9913751188.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/jeXqjcW/93490299269.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/PjdJUhi/dr_web_security_space_life_apk_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/geCjiOL/microtrip_game_hack_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_6014cf834a1d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/56307652492.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/xiluvewaxikake.pdfIn PDF document text
    • http://funasuruwet.epizy.com/9291376304.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/bharti_axa_life_insurance_plans.pdfIn PDF document text
    • http://zozadugaweguj.epizy.com/fupejunozowiwovijiremonim.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/96556508974.pdfIn PDF document text
    • http://zedaziwubisod.rf.gd/aww_full_form_and_meaning.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3F 5616 bytes
SHA-256: 0111219f59c1b949d7e4e7e27aa773485e72805b13daa1654eaca6a8f28856c3
font_01_sfnt_off0000fd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6D 13232 bytes
SHA-256: 5fbdebf86b8c009f35f6b887c4d994e9ca5ebabe9fdaec76ca9f82d3ef5c9ab8

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