Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f98e97793b417b8…

MALICIOUS

PDF

77.2 KB Created: 2021-04-03 22:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fe8a90c3cc7db66bd6b73af374f35e72 SHA-1: 88a8566374261505612dbf01468d8499782e793b SHA-256: 7f98e97793b417b899058ffa776d637678582f02a8f2f0421a5411d05b60abe5
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://bologen.ru/strik?utm_term=how+to+write+a+case+study+conclusion PDF link annotation
    • http://design-kvartira.info/nidatejuboxevoxiwixowinafvly9h.pdfIn PDF document text
    • https://mezinetoxapim.weebly.com/uploads/1/3/4/8/134887379/sowilulevevutopawo.pdfIn PDF document text
    • http://stakingyfi.com/fasaruderukisidaliresa203av.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/complete_symmetrical_patterns_worksheet_ks1oe6sr.pdfIn PDF document text
    • https://pukelubaluwo.weebly.com/uploads/1/3/4/7/134741361/rujujapusanilad-fibixupo-jimokonorap-xogedevobasemud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497081/normal_602c92bc59e24.pdfIn PDF document text
    • https://cdn.sqhk.co/bepotedaxus/icHHGjg/68871355356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_5feaf3899983c.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/sje5hgi/18923338052.pdfIn PDF document text
    • https://nopiwevupemaro.weebly.com/uploads/1/3/4/6/134653234/zijifaj.pdfIn PDF document text
    • https://warajepujevofi.weebly.com/uploads/1/3/1/8/131857140/fuzazek_ravus_gigakam_dotezivofugoxal.pdfIn PDF document text
    • https://zinaxavum.weebly.com/uploads/1/3/4/3/134354277/mozejaz.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/i2plnhh/when_will_yellowstone_season_4_release.pdfIn PDF document text
    • http://vidclips.design/administrao_pblica_para_concursos_renato_feniliayxtd.pdfIn PDF document text
    • http://chaptejvxz.fun/98299791586war0b.pdfIn PDF document text
    • https://rorefodelubo.weebly.com/uploads/1/3/1/4/131452934/149b0736aa57.pdfIn PDF document text
    • http://top-agent.ru/collect_like_terms_definitionzz27u.pdfIn PDF document text
    • https://turuposuka.weebly.com/uploads/1/3/5/4/135400354/1327544.pdfIn PDF document text
    • https://jubitire.weebly.com/uploads/1/3/4/0/134017652/2767197.pdfIn PDF document text
    • http://daddytestit.xyz/kmelerde_kesiim_ve_birle9o2az.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF200 5088 bytes
SHA-256: 11c30a0c00f4e88b35cce96d6d2d13e51a1c9ff8c4082f59af12f0dfddb16a19
font_01_sfnt_off0001036a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036A 10712 bytes
SHA-256: fb42b0e0319e30de59bb813690c45d1ac64e63c2e390bdaef4cecae18ca293de

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