Malicious PDF — malware analysis report

Static analysis result for SHA-256 cecef43c667e0e7e…

MALICIOUS

PDF

75.4 KB Created: 2021-04-28 01:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d6f67e5578a1a55e4b4694285c72ea13 SHA-1: 93fbd12aa70a11242702eeae36afd430d8bbe9c2 SHA-256: cecef43c667e0e7e00c6594a4c72cb3be8eab0d25c04475176f516ad140f4038
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a common search query, suggesting a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=how+do+i+use+my+18+quart+roaster+oven PDF link annotation
    • http://seweripuwas.mywebcommunity.org/28198750487.pdfIn PDF document text
    • http://fiduvizowema.iblogger.org/52320134445.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/edward_said_biography.pdfIn PDF document text
    • https://vegivuben.weebly.com/uploads/1/3/4/6/134660922/5950027.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/arabic_numbers_1_to_100_in_words.pdfIn PDF document text
    • http://nobumowur.iblogger.org/biological_activity_of_benzimidazole_derivatives.pdfIn PDF document text
    • http://wajazenizur.mywebcommunity.org/jimawipotaji.pdfIn PDF document text
    • http://kudukudimox.sportsontheweb.net/amiodarone_davis.pdfIn PDF document text
    • https://mezikemopirexat.weebly.com/uploads/1/3/5/9/135993778/6502654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bubalafugevale.rf.gd/pitojuzamumejupaxobizo.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_f378fffbfaf543c9880f7e0b2fe4a74c.pdf?index=trueIn PDF document text
    • http://nejesezape.myartsonline.com/lead_lag_compensator_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/082f4804-a257-4adb-92ed-a33ba9186ef8/14881011461.pdfIn PDF document text
    • http://pusebirenox.myartsonline.com/57859169907.pdfIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_6d1475b09fb147c0959242a10676bf06.pdf?index=trueIn PDF document text
    • http://wujupubemerij.epizy.com/tojelilonaxijidodib.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/zojuwujagu.pdfIn PDF document text
    • https://574dee49-ee40-4737-ae02-340ce2b26f9d.filesusr.com/ugd/b44cf7_b1ced7546a6546a3aa36b165b9d0f7cd.pdf?index=trueIn PDF document text
    • http://vekemelegewimo.atwebpages.com/what_is_a_narrative_paragraph_examples.pdfIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_50a1bd3190fc40cfac6548ba156ad33a.pdf?index=trueIn PDF document text
    • http://moxuzaridob.onlinewebshop.net/95249826356.pdfIn PDF document text
    • http://vufuxit.epizy.com/sowadexogugejakaforepet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77b562b-2b0d-4faf-8f3f-83b4ae686e31/45091394607.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_off0000e66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66B 5524 bytes
SHA-256: 7984daf2879dfcd305d0019d373764bcee762f31749d48e5a9bd4ed41f47c5b6
font_01_sfnt_off0000f93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93D 11516 bytes
SHA-256: caec5079770a056f36f636b48f848772df25a781cf93cccbc30421562cdbc7f2

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