Malicious PDF — malware analysis report

Static analysis result for SHA-256 4285a9682acfd555…

MALICIOUS

PDF

83.8 KB Created: 2021-03-13 23:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 467ab22f4b1645fd780a9f17631900f4 SHA-1: 0e81790569b7bb554a58956a3a208c7236f399d3 SHA-256: 4285a9682acfd5558c2398d86788951c569cad1abbf488a175125eef6132d446
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm designed to direct users to external websites, with one heuristic specifically identifying it as a SEO link farm on disposable hosting. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or malware distribution. The embedded URLs suggest a pattern of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/wix?keyword=pdanet+5.10+full+apk+cracked PDF link annotation
    • http://pikegupima.medianewsonline.com/anatomical_directional_terms.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449605/normal_60325832e82d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460231/normal_602c010a11a4d.pdfIn PDF document text
    • https://zubikazosiz.weebly.com/uploads/1/3/4/7/134761183/sobatot_vexap_gisuseluton.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449776/normal_6038fecb0937e.pdfIn PDF document text
    • http://mesutilixuta.sportsontheweb.net/1075493655.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410703/normal_6005c6f5064ec.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/vCYsvji/tobijesetukifazelebulo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366398/normal_5fc597a045b91.pdfIn PDF document text
    • https://nunatazireru.weebly.com/uploads/1/3/4/6/134698050/vemaj-wedaxaro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404299/normal_6048bf128a68a.pdfIn PDF document text
    • https://kikosezuzo.weebly.com/uploads/1/3/1/3/131378972/xixifarametis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409000/normal_6024c0e5a3966.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376087/normal_5ff8ac4bcc4c3.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/scott_foresman_word_study_and_spelling_practice_book_grade_6_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489054/normal_5fe9d849909c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492278/normal_600db1f072628.pdfIn PDF document text
    • http://rebezun.mygamesonline.org/pathfinder_kingdom_building.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/63775006276.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/iiigwOT/belunadagimifovawukesiwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef9290cc-6001-40bd-ad58-d18915698ead/another_name_for_a_daybed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc91b74a-52c5-443b-95a3-dc898b523cc9/bomifexane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d57f4e5-f650-4d39-89d0-fa9bcd644745/christmas_carols_listen_online.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_off0000fc00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC00 2880 bytes
SHA-256: aff11289bf87f92bc53c0e2abc335208e29b6db8a954e82fd0a5595ffa95d344
font_01_sfnt_off0001063e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063E 5388 bytes
SHA-256: 928a4fdaedd8ffb98ca989732edb1e892cc51edf640ecd54992113b8365c708e
font_02_sfnt_off000118ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BA 12880 bytes
SHA-256: e8041a8ba26cd2b5025984e441457ba40e725da7821fe754c3afd68b5c68057f