Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a35679d614dc0c…

MALICIOUS

PDF

75.2 KB Created: 2021-04-20 18:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ad51785e47d56e6c8d4c71cd28436592 SHA-1: 543619594b0b7ba8053b85468ea735643b7eb9d5 SHA-256: e0a35679d614dc0c582952abb1ddbcb2ce31c8d130b9a2a682bc4c1cdfebdb0b
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 0.9991

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://ponafet.ru/strik?utm_term=encinitas+marine+safety+center PDF link annotation
    • https://nimivisedasefu.weebly.com/uploads/1/3/1/0/131070972/visofimoruxiwanoxa.pdfIn PDF document text
    • http://bit-ipo.ru/marshall_avt150h_half_stacknjjyo.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/muponusemefoga.pdfIn PDF document text
    • http://iceteas.space/sufetubemuzigevzyftq.pdfIn PDF document text
    • https://dudabiwik.weebly.com/uploads/1/3/4/3/134354119/kimosetive_migipiwisozerut_kedelalepuw_duxosudufuki.pdfIn PDF document text
    • https://zajefogana.weebly.com/uploads/1/3/1/4/131407312/a590cbd5d57949.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/2863875471.pdfIn PDF document text
    • https://nobawevedidilut.weebly.com/uploads/1/3/1/3/131379382/ritesedejadoji_dizebaxa.pdfIn PDF document text
    • https://zedalikekotax.weebly.com/uploads/1/3/1/1/131163955/2f3c8c8ea8e82.pdfIn PDF document text
    • http://begefif.iblogger.org/walt_disney_animation_studios_the_archive_series_story.pdfIn PDF document text
    • https://xetuvamabur.weebly.com/uploads/1/3/1/4/131409037/gomubesamufopo-gokar-rixurunotodew.pdfIn PDF document text
    • http://douchehq.xyz/4917331330qki2h.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/vinebesatixeg.pdfIn PDF document text
    • http://new-volosi.ru/2004_dodge_ram_1500_3.7_towing_capacityrucry.pdfIn PDF document text
    • https://noxiwufozale.weebly.com/uploads/1/3/0/8/130814513/tisavupupik.pdfIn PDF document text
    • http://glossywp.online/zebiwopikiloxozaduvafupewg9btu.pdfIn PDF document text
    • https://poxozebirineba.weebly.com/uploads/1/3/4/4/134447173/6160035.pdfIn PDF document text
    • http://mivigodaxi.iblogger.org/bee_hive_construction_plans.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/60142113379.pdfIn PDF document text
    • http://poposiruta.mywebcommunity.org/nobefokiwesewixaxiwupej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_577b41cf46c94f1086bf69a8cf38d7fe.pdf?index=trueIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_38fb39adc8c74dff822addf460b80308.pdf?index=trueIn PDF document text
    • http://vedalutepex.rf.gd/nixavuzepeponidowibi.pdfIn PDF document text
    • http://wurebosuloxu.myartsonline.com/amreli_express_newspaper_download.pdfIn PDF document text
    • http://pumuvezanasen.rf.gd/anlage_kind_2020.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DC 5052 bytes
SHA-256: b7daa2c81083750048de4ba980f9935fc3891332ccd76aaaf2a8bd801b068ff9
font_01_sfnt_off0000fa02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA02 10864 bytes
SHA-256: 0f4b97f4c81fee955c9f037d3ede7c9d63820995f0c9915090d1f8f92c35df21