Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea2d3c6d431a531…

MALICIOUS

PDF

72.1 KB Created: 2021-02-12 21:20:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7c3c1a01de870729f3e04e6330169b0d SHA-1: 5a17b61720a439f60aa82554a2b4d466474855be SHA-256: 9ea2d3c6d431a531e3acc08653471fdc934fa1fc800a16a1dbd5e69c441cdce7
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 0.9997

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/wix?keyword=polymer+permeability+which+plastic+wrap+prevents+evaporation+best PDF link annotation
    • https://cdn.sqhk.co/defisepeniba/d6E71j5/kolafepogidow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_5fd1f193dd346.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/jambyie/mobile_edge_lighting_colors_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/jcGgehf/zarchiver_mod_apk_android_1.pdfIn PDF document text
    • http://banepudota.iblogger.org/15464403459.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453134/normal_5ff8a803d7c01.pdfIn PDF document text
    • https://cdn.sqhk.co/javufikari/Ihegfic/hack_mod_among_us_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/ih4jfaT/9117770341.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://daduzafez.epizy.com/bhavesh_joshi_superhero_all_songs.pdfIn PDF document text
    • http://repofifimi.epizy.com/dead_by_daylight_mobile_pc.pdfIn PDF document text
    • http://joriboka.epizy.com/wagilorevidifeketojijazu.pdfIn PDF document text
    • http://momobolabewonu.epizy.com/62101591814.pdfIn PDF document text
    • http://suvixemekuwavi.epizy.com/vomanak.pdfIn PDF document text
    • http://sonapap.rf.gd/refelek.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_off0000dc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC58 5568 bytes
SHA-256: d98ad6bc053c865d0d115187950dd14bb82df3b9fdd5e2cd0fecf0ea6ea74930
font_01_sfnt_off0000ef36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF36 10472 bytes
SHA-256: 21af4c944b4bb5955afa74d6c9485e615577b26aedc48245c422ebf426493a72

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