Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e84c11967c7e063…

MALICIOUS

PDF

85.1 KB Created: 2021-06-12 09:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f6b4f207aa830063992d47414cd4129b SHA-1: a48b35c64bf659ac7af8bb2f39cef516a5b7be4b SHA-256: 0e84c11967c7e063f0023def920d015a270a5c6dab16be0d925ba75607d9eac7
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 0.9996

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 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://queure.ru/pbw?utm_term=destinos+episode+5+worksheet+answers PDF link annotation
    • https://wupifikuzokure.weebly.com/uploads/1/3/4/5/134529023/3e541ef021.pdfIn PDF document text
    • https://dewazolasimuf.weebly.com/uploads/1/3/1/4/131453174/59121dbf.pdfIn PDF document text
    • https://xugasejesakegeg.weebly.com/uploads/1/3/4/6/134617370/893040.pdfIn PDF document text
    • https://jopomewimedadi.weebly.com/uploads/1/3/4/4/134465277/vobis-demumug-xinetoseges.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414152/normal_60bc650ff3079.pdfIn PDF document text
    • https://vuvowopivuvi.weebly.com/uploads/1/3/1/4/131410126/2a22c.pdfIn PDF document text
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/ponejokenamerafirad.pdfIn PDF document text
    • https://lotimameligibim.weebly.com/uploads/1/3/4/2/134235738/fakota.pdfIn PDF document text
    • https://xudidetopos.weebly.com/uploads/1/3/4/5/134579215/vogovexedomabi-verokofife-birijan-pebaw.pdfIn PDF document text
    • https://manadazalivufud.weebly.com/uploads/1/3/4/3/134358645/vowawuxixipisekowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_6067e9207ac27.pdfIn PDF document text
    • https://xepuduwosijun.weebly.com/uploads/1/3/4/6/134634987/sunojutobiwaxen-zewulukodu-kuworepe-mikavapapozewap.pdfIn PDF document text
    • https://sinuvofibudibaf.weebly.com/uploads/1/3/2/6/132696377/vudenino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449004/normal_600d35a76202c.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/f9802c41-432d-44c7-b96c-8c2504f99cc7/ccnp_route_exam_booking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7417cd9f-0850-4f2f-971f-35853af05b25/what_is_a_primary_topic_for_investigation_in_positive_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed7953fc-07cb-4b60-aead-f2a25ceb1264/vba_tutorial_w3schools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/622f72f6-69d3-4804-80de-21aa27d575c0/mojolujemamuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a22340ba-52aa-40c0-a1c0-c76069e383bd/nojuxijejoruv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb34c78-99c7-489c-9325-da399236bdaf/exercises_for_sciatic_nerve_pain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e103bd-3c75-481f-86e4-3409399da605/23380387843.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_off0000fdff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFF 5080 bytes
SHA-256: 5c87e5baadbc33e6ab91817e8f97248845fe4799312219e75102ae7d050fd6b3
font_01_sfnt_off00010f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4A 12596 bytes
SHA-256: e9b519c538964e5b67ad8125e0f858b5800093c653b964fde8cc411770f60df8
font_02_sfnt_off00013864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13864 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e