Malicious PDF — malware analysis report

Static analysis result for SHA-256 79575a027ca81329…

MALICIOUS

PDF

75.9 KB Created: 2021-04-04 21:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 69c122ac7ae615346017506c2f7f7807 SHA-1: 58798ae77bdf34ab8f75857a3f183da21a6854e3 SHA-256: 79575a027ca81329f183f204b21394b77a7524670ce39c7f13e9318029b2dd45
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=will+there+be+a+book+after+crooked+kingdom PDF link annotation
    • http://prizyivnik.ru/how_to_get_irr_from_npvt85on.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_60654bfc49b06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419847/normal_6038ccfbca77b.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/ge_oven_326b1230p001_manual5zmoo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411229/normal_601672194a25c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502906/normal_605a66814acb4.pdfIn PDF document text
    • https://fidifeso.weebly.com/uploads/1/3/1/4/131408027/kirepafatimo.pdfIn PDF document text
    • http://gejurabek.getenjoyment.net/31559701143.pdfIn PDF document text
    • http://ionatr.space/gana_achu_video_song_wapwonvbi6v.pdfIn PDF document text
    • https://bugituwixumanuz.weebly.com/uploads/1/3/4/7/134722584/niwezizakefejir.pdfIn PDF document text
    • https://dagaroxir.weebly.com/uploads/1/3/5/9/135973008/f933f.pdfIn PDF document text
    • https://zavisedifigi.weebly.com/uploads/1/3/4/3/134316550/xuvufuzo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fofomekurun.rf.gd/45298094197.pdfIn PDF document text
    • http://zabusokaruzovi.rf.gd/73019097589.pdfIn PDF document text
    • http://zakidudo.epizy.com/10227550956.pdfIn PDF document text
    • http://zewajus.rf.gd/rakekujuru.pdfIn PDF document text
    • http://regebutesu.epizy.com/73507667275.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/only_fools_and_horses_quiz_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/6525150124.pdfIn PDF document text
    • http://tudugir.atwebpages.com/74160814970.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/30369120770.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/jedi_outcast_bespin_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/memrias_pstumas_de_brs_cubas_em_quadrinhos.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

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_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 5472 bytes
SHA-256: c9f65973c41799edb121c845066099f85f49775b97a86036a9f8f49d219cba1c
font_01_sfnt_off0000fc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5F 11536 bytes
SHA-256: c0d082232ceecf936725e726d21ce7be0569530a4af1a575430030c408083a26

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