Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72cfdb6c3e641db…

MALICIOUS

PDF

80.1 KB Created: 2021-03-05 02:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c6c8b3a7eb50a9f24aa0550cd0486997 SHA-1: d749275dd599b6d389325908c5041e9cf353cde4 SHA-256: c72cfdb6c3e641dbdf9ff497b23c22755a03ba82b707b3b9bb467d720f7b177a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to movie search terms, indicating a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://nipisod.ru/strik?utm_term=percy+jackson+first+full+movie PDF link annotation
    • http://domsale.xyz/817529688201qfwy.pdfIn PDF document text
    • https://cdn.sqhk.co/pupumukisev/hfQidha/does_eddie_kaspbrak_die_in_it_chapter_2.pdfIn PDF document text
    • https://tovejuzu.weebly.com/uploads/1/3/5/3/135398771/sogavo-zidiz-navebodubo.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/ieidLha/36305264519.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/ibgfnNa/24236089596.pdfIn PDF document text
    • http://barashik.space/19863894988yt859.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/gxwhdji/38616695613.pdfIn PDF document text
    • http://jsexj.fun/vekibadisinoralesiao4ba.pdfIn PDF document text
    • https://jugifipunud.weebly.com/uploads/1/3/1/4/131437595/miluli_muwuwadoluz_sigikigo.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/dlvASI5/puninofogoko.pdfIn PDF document text
    • http://baltika-trans.ru/kobrann_ykselii_2_trke_dublaj_izle4s7h8.pdfIn PDF document text
    • https://gidelusibi.weebly.com/uploads/1/3/4/0/134040719/cc1a82a1b1.pdfIn PDF document text
    • https://cdn.sqhk.co/lijuwezasip/uhcOYr3/duguwulexigare.pdfIn PDF document text
    • http://newsportstechnology.ru/8024416224vx0sm.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://uploads.strikinglycdn.com/files/1193400c-aa92-4aab-a360-93099fe4dd6a/fifenigiraboro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e73cd9-b2a2-49c3-afd3-438de26d9d2a/30952383550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6708c5c1-d575-4db8-adba-c68b463ffb62/81034252886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f1e183d-d927-4e4e-af07-0cba3e7a7c92/alpha_omega_elite_car_seat_weight_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69143353-13ba-492d-b170-0b53575f9bd6/45336032960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49625085-7b34-4b71-bf32-fb80e543b565/16109741596.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE85 5212 bytes
SHA-256: c11a091edc9aae80c2c4e483cfa51123afeea342defa99c7d0ebf2ccc0d6d038
font_01_sfnt_off00010034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10034 11000 bytes
SHA-256: 88355b5d5c8e2c75a0e2d71470520a476709a95a87c559c1c2d398da653d9333
font_02_sfnt_off00012495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12495 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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