Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5d4f7ea22d060c…

MALICIOUS

PDF

90.4 KB Created: 2021-06-08 01:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ad0de8d72befb3d085376a3883548193 SHA-1: 92cabf6b38742a9f6edbc09a37427f1d852c1260 SHA-256: fa5d4f7ea22d060ccfb9fe35afe4c249784c2ff602fc10dde23b32bd4a99a4da
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 0.9992

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://nomylo.ru/pbw?utm_term=the+tylenol+murders+case+study+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497110/normal_5fe40fc831d75.pdfIn PDF document text
    • https://loratabupufedev.weebly.com/uploads/1/3/2/6/132695903/bopudalis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_5fd650afde8af.pdfIn PDF document text
    • https://wijinopupog.weebly.com/uploads/1/3/5/3/135323990/36213b71ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387928/normal_600fd78a42fd9.pdfIn PDF document text
    • https://rezomiwutamanap.weebly.com/uploads/1/3/4/3/134362688/3598528.pdfIn PDF document text
    • https://fuveweji.weebly.com/uploads/1/3/3/9/133997503/952898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410731/normal_6035ce6373521.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e1b3f72-1826-4bab-a18e-9b738d9016c4/92693272471.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/w/file/fetch/144555504/83451969998.pdfIn PDF document text
    • http://tufukamapaf.pbworks.com/w/file/fetch/144528846/bavakevotoduvovisux.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/w/file/fetch/144501531/organic_chemistry_as_a_second_language_2nd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b17a3442-5b98-4f68-8039-738a9be61da5/pokemon_red_unblocked_77.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a37dab5-fc65-4cac-88b6-62bee762be43/fagova.pdfIn PDF document text
    • http://zikasamu.pbworks.com/w/file/fetch/144821421/how_to_reset_a_kenmore_665_dishwasher.pdfIn PDF document text
    • http://vamafob.pbworks.com/f/piwebisexumudawax.pdfIn PDF document text
    • http://rimogeto.pbworks.com/f/17937937029.pdfIn PDF document text
    • http://kekirow.pbworks.com/f/jubotuv.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/w/file/fetch/144518001/operations_management_book_by_william_j_stevenson.pdfIn PDF document text
    • http://kikipudojuzo.pbworks.com/w/file/fetch/144820461/how_to_calculate_the_golden_ratio_of_a_rectangle.pdfIn PDF document text
    • http://fisukafetif.pbworks.com/f/zozefesilubiwojitiwuvan.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144420741/exercicios_termos_integrantes_da_orao.pdfIn PDF document text
    • http://kenoxipej.pbworks.com/f/29051047149.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_off00012440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12440 5324 bytes
SHA-256: 1a185d0b72bc2c4428e8b06ffe0d4fb9de08b912cff53066bf29dd54f9ef9291
font_01_sfnt_off00013641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13641 11244 bytes
SHA-256: 9c9d21b0ccde49a8730c1a9df0985c4a2c55c657a60b4798ebfc5e93d17b8cea

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