Malicious PDF — malware analysis report

Static analysis result for SHA-256 7608995259fb3665…

MALICIOUS

PDF

78.6 KB Created: 2021-04-07 12:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 77a775c55a756013c6b9ef051d36899f SHA-1: 11236b7f3de5f46971fe2d39f78c42c6c3ea9a89 SHA-256: 7608995259fb36658f2ca7a780d3c73273b58a18ef16721ee45f8300b2915b35
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://fokemale.ru/123?utm_term=cyme+oxygen+bubble+sheet+mask+review PDF link annotation
    • http://todayit.pro/make_lemonade_by_virginia_euwer_wolffgnylu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382619/normal_605574450e4f0.pdfIn PDF document text
    • http://slimitalia.space/how_many_female_greek_gods_are_therei4u9t.pdfIn PDF document text
    • http://drovazvenigorod.ru/majosakewasugephg7s.pdfIn PDF document text
    • http://starkrobotics.org/444936358913ppi0.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/haqBtIH/love_application_english.pdfIn PDF document text
    • http://meetsoda.club/kabijifobosekq6k8n.pdfIn PDF document text
    • http://balifruit.com/micro_vu_excel_52204xzu5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472213/normal_6066c7ee4f11a.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/ghiiiiU/temazowivipa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447878/normal_60098ab65aaaf.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457573/normal_5fec265ed7436.pdfIn PDF document text
    • https://cdn.sqhk.co/xafemepino/hjewjet/boulangerie_meaning_and_synonyms.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_84e78d82d78f4fa090bc5a76d5d9738c.pdf?index=trueIn PDF document text
    • https://041c2bdd-267b-4995-9d72-d071cf2c2b2b.filesusr.com/ugd/ba0b69_cc796c01de78402497764ff7f3087aed.pdf?index=trueIn PDF document text
    • https://e31b828f-dd5d-4b35-abba-5777d5fc2ed6.filesusr.com/ugd/56a8cc_d26d4a64e2fc41359f7cf2bc4911151d.pdf?index=trueIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_f399eeaa6f30486e847df8fa33a3ecbd.pdf?index=trueIn PDF document text
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_57d11da4e45048e986636b92e4cff8aa.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40C 5532 bytes
SHA-256: 5441f8d818c7fca123f5b03a9e6f6bbdd54285b80c8fe0b981172b65a0500ac3
font_01_sfnt_off000106cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CD 11236 bytes
SHA-256: 7ad21d227cac16c47afa3e84735b5835e8a27e8f0225b3e3ad1dbc4e643a5331

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