Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eaaa06f4a317c58…

MALICIOUS

PDF

76.3 KB Created: 2021-03-12 09:47:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 86d7bc5c525620b6c92119badf73f0a4 SHA-1: 3ca229afea83a6e8222c5dd395c91a66e252d440 SHA-256: 2eaaa06f4a317c58f5d7c751f11f48b692bd36ef0e828f313e49d40828d8fa09
186 Risk Score

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. 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 0.9977

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://vilenefex.ru/award?keyword=acinetobacter+infection+pdf PDF link annotation
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/7e6b236dc9f803c.pdfIn PDF document text
    • https://gisoroweri.weebly.com/uploads/1/3/4/8/134893792/8099587.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/gjtEiel/32871403082.pdfIn PDF document text
    • https://bunixidulot.weebly.com/uploads/1/3/5/9/135964284/mazuz_gavuti.pdfIn PDF document text
    • http://jijagigipijum.iblogger.org/78320445434.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/cc2ySii/vimunas.pdfIn PDF document text
    • https://sozazajigosana.weebly.com/uploads/1/3/0/7/130739782/0d4bc2c36.pdfIn PDF document text
    • https://cdn.sqhk.co/muxaferamet/JMifzYk/11401101825.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/sfhjIgh/bubble_shooter_fruit_new_version.pdfIn PDF document text
    • https://gofegupozomo.weebly.com/uploads/1/3/4/4/134479888/jabivudexam_rajasazuruwewef_ruvipobeterula_kifobadudi.pdfIn PDF document text
    • https://cdn.sqhk.co/kosadara/TibPjji/minetest_online_server.pdfIn PDF document text
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/guxamalil.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/AhdbgcE/wovunuwekenafadirofe.pdfIn PDF document text
    • https://cdn.sqhk.co/zibavuna/fQoXJoq/schema_electrique_moteur_essuie_glace_2cv.pdfIn PDF document text
    • https://zajodufukotu.weebly.com/uploads/1/3/1/8/131857357/4136495.pdfIn PDF document text
    • http://panuxidoku.22web.org/john_deere_214_attachments_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/rukokota/gcl99U4/lubavikexebak.pdfIn PDF document text
    • https://cdn.sqhk.co/vugasoveg/pjejdjc/12550511313.pdfIn PDF document text
    • https://cdn.sqhk.co/wusosekame/ZJ1YXPS/pumipifukavasiroz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://businaniz.epizy.com/kimije.pdfIn PDF document text
    • https://7ae774ad-b64d-4473-a0b1-aa0db1e39e83.filesusr.com/ugd/3e7897_dd0e533d52a94dbb85b88564486b9d0f.pdf?index=trueIn PDF document text
    • http://zelofamaguxedep.epizy.com/cbt_nuggets_70_740.pdfIn PDF document text
    • https://19b6c5dd-7044-4bc4-a11e-ea80cf7064f5.filesusr.com/ugd/f34823_89ad31d098994ce9ac4bc6714e756072.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF145 5068 bytes
SHA-256: c260c71225330789c76464fa3ab8fc2a1d6655fbf4e3e7837d45b968bd51437c
font_01_sfnt_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 10600 bytes
SHA-256: bba8a8c088b4dd73a581bd093359fe8a1f1a73c4a48ee984d1ab6e012dc0bac0

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