Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d56e5726648111a…

MALICIOUS

PDF

87.0 KB Created: 2021-03-06 07:32:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c3a73aa2aff03c69e51ba6619920e144 SHA-1: 97e23e62504c6fa821012511154322d108e8b399 SHA-256: 8d56e5726648111a2b8c3358f14342c3b1ec17fc775dfc1f9842b2927331676a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9981

Heuristics 5

  • 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 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://leonvi.ru/strik?utm_term=real+ghost+story+in+tamil+fear+files PDF link annotation
    • http://dakisemakegag.sportsontheweb.net/what_is_dataset_object_mcq.pdfIn PDF document text
    • https://gatakuluva.weebly.com/uploads/1/3/1/8/131856326/9067254.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/jaTmtie/9341181950.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/eejaVTM/meteor_storm_2020_danmark.pdfIn PDF document text
    • https://fevuvewuvadudu.weebly.com/uploads/1/3/4/6/134650824/64fafe.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/AifahfK/50547701045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393761/normal_6033747c48e41.pdfIn PDF document text
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/d58d3f99364.pdfIn PDF document text
    • https://nateguwab.weebly.com/uploads/1/3/1/4/131453796/4858763.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiderubota/rgj3bhc/guilty_gear_xrd_rev_2_steam.pdfIn PDF document text
    • https://cdn.sqhk.co/tipekafomube/eOUFdge/top_90s_music_groups.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449984/normal_5fcaadcd54f50.pdfIn PDF document text
    • https://wugexufaferefe.weebly.com/uploads/1/3/0/7/130776446/gelewugivi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480897/normal_5fec2ce5d9d85.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/d27bd5ff-f850-469b-894b-a1cf954474ec/37230641506.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/86268008943.pdfIn PDF document text
    • http://xakagigoneliv.myartsonline.com/vuvufejakazovevon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523b7994-c124-4161-8bc0-eb664f1bfd35/xenoxivav.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/99354475741.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/3610410920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5459e2e8-8ef4-49e9-b982-d5f411f03f29/honeywell_8000_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c9ea2a5-51b5-4880-9788-6766ad1a723a/damusatesesadefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9439382f-36f2-4098-90bf-91b0282d45b7/what_are_some_fractured_fairy_tales.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/najitemozabanuki.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF605 5288 bytes
SHA-256: 5407f4769d0653d37d68820412394c6063138895c87b696be224442125032457
font_01_sfnt_off000107de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DE 2192 bytes
SHA-256: 5c9b4303eec2be7465a70a4bf0bf42d6a7847045252e0db44991ffe89e50fca8
font_02_sfnt_off000111f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F1 10840 bytes
SHA-256: a13ede82864bd692f912b33ed99ffdaa06605474803943815bee159245f76f25
font_03_sfnt_off0001368f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368F 16168 bytes
SHA-256: e5458d7b6d82539349b17fc4713a17e1381d471255c72d9f8116b7c86e08c443