Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2154d2f0c7e0d8f…

MALICIOUS

PDF

77.7 KB Created: 2021-06-07 04:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5dc6f00a8620e9e2f2b0faf61b7e6f90 SHA-1: 21a921ed4d2615f215d7eebe36a6dc18ed18f8b1 SHA-256: d2154d2f0c7e0d8f074fcda798dff2faab0f27adb5ed3a66745cc7a9907545f9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://pelibifir.ru/123?utm_term=powerpoint+templates+macbook PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466398/normal_5ffca3143d9ff.pdfIn PDF document text
    • https://lewuseloti.weebly.com/uploads/1/3/1/4/131437615/80c6c6e.pdfIn PDF document text
    • https://gulapizebulo.weebly.com/uploads/1/3/1/0/131070336/bidufivip-wesenetaxifujuz-gipox-luwetupilopow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406787/normal_60499a74bfdf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490141/normal_603c4809297f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464052/normal_60209ece28996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454999/normal_600c0ae3dc1bf.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4368500/normal_60b40fadef97e.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
    • http://subazim.pbworks.com/f/87578127153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dad7e57-f07e-4fb3-9697-a372794e2910/10311908059.pdfIn PDF document text
    • http://vifogajo.pbworks.com/w/file/fetch/144499452/wedoseve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ddea24c-ca36-45da-960d-02b09ae0cfe6/craftsman_electric_chainsaw_sprocket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf7a26b-170e-4baa-97c6-2b96b62bcd0c/21161144928.pdfIn PDF document text
    • http://zeladejan.pbworks.com/w/file/fetch/144469557/the_road_to_dune_epub.pdfIn PDF document text
    • http://fudejob.pbworks.com/w/file/fetch/144499464/is_the_ruger_sr9_a_good_gun.pdfIn PDF document text
    • http://felinemumivu.pbworks.com/f/volvo_penta_parts_catalog_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6257a645-7ad1-4085-8445-0628524a48cb/pokemon_liquid_crystal_goldenrod_city_walkthrough.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/w/file/fetch/144759174/how_to_pair_bluetooth_kenwood_kdc-bt742u.pdfIn PDF document text
    • http://lufokomarib.pbworks.com/f/foridamisuxesasuzaben.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_off0000e3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 5164 bytes
SHA-256: 4d6d2abe17b097558fe437b664ee386891b526b3c86fd861a4fd7085f8979d9a
font_01_sfnt_off0000f534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF534 11388 bytes
SHA-256: eb1e7eaa52ed86edede0e02db93b7a1a0bdd8a9de4da5e6869fe9bd6b64ac5e8
font_02_sfnt_off00011b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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