Malicious PDF — malware analysis report

Static analysis result for SHA-256 97342f3d63d310e1…

MALICIOUS

PDF

98.8 KB Created: 2021-04-03 22:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbcb977e6049912c1f60cab497cb21c0 SHA-1: af573588bdef4495155d302874828951d8992f73 SHA-256: 97342f3d63d310e16d9dd4cf79d380d01d77b7b29b74e7f3f4da0686ff50070f
226 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, and is flagged as a link farm. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users with promises of prizes or funds, a common tactic in advance-fee fraud. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://maypoin.ru/wix?keyword=hurricane+webquest+answer+key
    • https://gipusarele.weebly.com/uploads/1/3/4/7/134708700/pekofisoli.pdf
    • https://vixixufabajuwe.weebly.com/uploads/1/3/1/1/131163632/6609095.pdf
    • https://cdn.sqhk.co/kezomerameki/0igifp9/21566377635.pdf
    • https://cdn.sqhk.co/pugepavofu/iEhbiyc/amc_movie_theater_rental.pdf
    • http://penexej.mywebcommunity.org/48045390919.pdf
    • https://naxozafo.weebly.com/uploads/1/3/1/4/131483391/11698.pdf
    • https://gadogirunen.weebly.com/uploads/1/3/5/3/135347667/pojijekejejebo-pimef-kuzobosemupix-wujifo.pdf
    • https://bididanigatozum.weebly.com/uploads/1/3/4/3/134314142/molito-busujajogew.pdf
    • http://xuritepizib.mygamesonline.org/gevedirukumetojopu.pdf
    • http://jevafurevozu.mygamesonline.org/are_audio_technica_good.pdf
    • http://tonilakifak.mypressonline.com/73594971191.pdf
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3156a51a-7629-446e-a928-2fa2f8bcd325/jobedumofoboxupumin.pdf
    • https://uploads.strikinglycdn.com/files/258fbd39-41df-4397-9630-a0ccebd033d5/47819287715.pdf
    • https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_09870d634a3f4cbb80eed77a1352699a.pdf?index=true
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_a2a486c28e3347539cd245959367c95f.pdf?index=true
    • https://78f5967e-1348-44d0-b43d-4fba71d4c3e7.filesusr.com/ugd/a94f6a_d5b8a7e5db6e419fbaf6959cd29129c3.pdf?index=true
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_22fc9bb215a6481ab1aca826f25f0448.pdf?index=true
    • https://uploads.strikinglycdn.com/files/01d7f8a5-d4b7-4ba7-8dc5-a2af2b649c94/golden_lion_tamarin_physical_adaptations.pdf
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_5bad5d60197841a4af9472ed4237e474.pdf?index=true
    • https://c02a3fa2-970f-4384-b4fa-7a60184a1b73.filesusr.com/ugd/1da3fe_0c44d4b754f84d7e8eb1eefdc9d52206.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8272a6b7-4095-422b-b064-accff4086673/89972461808.pdf
    • http://gavofime.atwebpages.com/84562269382.pdf
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_4a2b06d8307a43b3855dc26c5fd50713.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001472f.bin
4f960b443e92477b74e7d45f7dc4faa253343cdfc82c2924eaf78b3ebfb7e716
pdf-font-stream PDF embedded font (sfnt) at offset 0x1472F 5244 bytes
font_01_sfnt_off0001592e.bin
a65f30ce5806598ea05ad9f6af5c5002f62e83dd5ef4eb84ccc0ed6a35115213
pdf-font-stream PDF embedded font (sfnt) at offset 0x1592E 10672 bytes