Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e34bf958d209763…

MALICIOUS

PDF

82.3 KB Created: 2021-02-28 05:16:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 65a25f935fb2e30fda749fa55cdbe93e SHA-1: 27ebf1ba8a6b9438df27003d1dc0eec6bef5edb5 SHA-256: 6e34bf958d209763d66be5694aa543b9cc996b14b887992b7d262f6ba6ec80f3
134 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that lead to link farms, many of which are hosted on disposable domains and utilize UTM parameters for tracking. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=madden+mobile+hack+no+survey+no+human+verification PDF link annotation
    • https://cdn.sqhk.co/rolileduvof/hcYPKjb/minecraft_auto_clicker_mod_1._15._2.pdfIn PDF document text
    • https://cdn.sqhk.co/nezafomura/hcMQFgg/75495068273.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/what_does_social_constructionist_mean.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/4tgejhd/41487306940.pdfIn PDF document text
    • http://watogoda.mypressonline.com/91370372098.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/LjkRqid/alien_blackout_ps4.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/is_the_first_word_in_parentheses_capitalized.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/colt_ar_15_9mm_lower_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/3iehdKR/vomazokin.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/how_to_detail_your_own_car_interior.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445340/normal_5ff072565762a.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/hhhhhhg/rally_house_hours_independence.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bipovoromoj/22692387838.pdfIn PDF document text
    • http://lusiromipu.epizy.com/33081687816.pdfIn PDF document text
    • http://fakeloj.rf.gd/fesorikimawofawozadetojov.pdfIn PDF document text
    • http://vemevusakeke.epizy.com/77800303614.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/beauty_and_the_beast_piano_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/govorujotobafotowu.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AB 5516 bytes
SHA-256: 7f6b6bb680bc72e4b87aa74ca246c8d2a2af248a23e75c69543e4e3c2d6c13f1
font_01_sfnt_off0000fc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC38 2092 bytes
SHA-256: 78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2
font_02_sfnt_off000105dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DD 10952 bytes
SHA-256: bde04b2adc9d246f5bf3e84a3fa36563c4785722e1e0d6adee94be803cd03a66
font_03_sfnt_off00012b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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