Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa9617b409320b7…

MALICIOUS

PDF

71.2 KB Created: 2021-06-04 10:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5bbb1c83548b9e796ef8a0646c13ff35 SHA-1: 118141b39e479655530888a79cf978f772dac26e SHA-256: 8aa9617b409320b77747842c20c436a4fdc85efc7f13603e0df32840f5ed7bf6
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://pixomot.ru/pbw?utm_term=brass+knuckles+vape+pen+manual PDF link annotation
    • https://bekogome.weebly.com/uploads/1/3/1/4/131454098/jesal.pdfIn PDF document text
    • https://wekigenajelu.weebly.com/uploads/1/3/3/9/133999196/46687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494657/normal_6056ebc1acac7.pdfIn PDF document text
    • https://pesopipuni.weebly.com/uploads/1/3/2/3/132303043/454554dec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_600d6f2b68f9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424662/normal_5ff69d6612ed2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417809/normal_606ea9b181c90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375073/normal_5fc5efe1e3fa0.pdfIn PDF document text
    • https://dozogifelezu.weebly.com/uploads/1/3/4/3/134313369/d20a4.pdfIn PDF document text
    • https://mivujiwotogen.weebly.com/uploads/1/3/4/8/134867845/nexogu_lolazivenuxesom_bakexog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_602e52b7f34f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jolowajuwijo.pbworks.com/f/novela_india_una_historia_de_amor_capitulo_2.pdfIn PDF document text
    • http://xojipoxar.pbworks.com/f/fadawulanenep.pdfIn PDF document text
    • http://mavujeridolu.pbworks.com/w/file/fetch/144586818/sas_prep_guide_advanced.pdfIn PDF document text
    • http://zusemivak.pbworks.com/f/minecraft_apk_indir_android_oyun_club_15.6.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144485400/covid_cause_vertigo.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/f/atividades_sobre_pronomes_para_o_6o_ano_com_gabarito.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/w/file/fetch/144411585/zurudilufobalapabowu.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/f/99529903831.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/w/file/fetch/144586143/pojirezipujojarogozi.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_off0000d9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B4 5252 bytes
SHA-256: 8ca28067fe392a1df31f720171c7c0be404041669c35329438ea0caa757be67b
font_01_sfnt_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 10604 bytes
SHA-256: 28cecb99bdf4d55f0f666d74be5719683a880871a9fa4f58ab40b5bc0629f4d0

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