Malicious PDF — malware analysis report

Static analysis result for SHA-256 f817beccbf2064b9…

MALICIOUS

PDF

82.9 KB Created: 2021-03-12 00:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fb8576a32fb1d76eb3ff89ee2965ff0b SHA-1: 920307f62f7cbb016b7c77ce51b87f3508ccc50f SHA-256: f817beccbf2064b927a4481a70e179d06f2e263bddd56614167f88226c0b31d3
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 0.9996

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://fokemale.ru/wix?keyword=backyard+revolution+free+pdf PDF link annotation
    • http://myfoxing.online/dyson_v6_motorhead_rear_filter_removalub338.pdfIn PDF document text
    • http://niluwipewuxasa.medianewsonline.com/44344840161.pdfIn PDF document text
    • http://wokulorumal.iblogger.org/zuzivotezudeleka.pdfIn PDF document text
    • https://velalozelo.weebly.com/uploads/1/3/4/4/134498802/c693b395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_60158df6dee18.pdfIn PDF document text
    • http://wuwisometojone.66ghz.com/17084535440.pdfIn PDF document text
    • https://jefilixepiras.weebly.com/uploads/1/3/2/6/132681342/fd68ec7752dd.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/nagudagepidigi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470211/normal_60173fdb23770.pdfIn PDF document text
    • http://pifovabu.getenjoyment.net/40147669730.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416154/normal_5fce1138551f1.pdfIn PDF document text
    • http://gallery-shop.site/jowuripamifatinakadebivehhcuq.pdfIn PDF document text
    • http://seedcraft.online/neon_orange_nike_womens_running_shoesc92k3.pdfIn PDF document text
    • http://jeratojovu.66ghz.com/quiz_logo_game_answers_level_5.pdfIn PDF document text
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/vaputomulejup.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://fetekovabu.onlinewebshop.net/nespresso_aeroccino3_milk_frother_not_heating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98a717c6-c4e8-4b52-8209-1a7f91f1fa63/sazulidobidegawomopulekad.pdfIn PDF document text
    • http://xufazep.epizy.com/adobe_after_effects_smoke_free_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29d3cde3-646e-4a89-8d0b-9d2fa1e55d76/wufam.pdfIn PDF document text
    • http://bukuzagalu.rf.gd/putopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4eb2a9-6597-4814-a40a-c6bed18569a4/53199119149.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_off0000f9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D1 5128 bytes
SHA-256: 94ee5617ca5951172a18c3f115798f45415b747f8ad8bd6fad03c1275d6aa7d9
font_01_sfnt_off00010b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5C 10704 bytes
SHA-256: c8a44afcb5f076c3cc72ad0649e53f743d9189f65f9f4ceb0b7ba130a0764335
font_02_sfnt_off00012ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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