Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff109ef52f59ed5…

MALICIOUS

PDF

93.8 KB Created: 2021-03-23 19:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3a51b55eb39e3693beff2cd42973123e SHA-1: b175ce6b836514208128987e04ee1aa24fa3cd30 SHA-256: 8ff109ef52f59ed53738f6da2f540b2bb0be826951f2bcbaffed9d712fed5319
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 0.9997

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://nipisod.ru/aws?utm_term=graco+fastaction+travel+system+with+snugride+30+lx+reviews PDF link annotation
    • https://cdn.sqhk.co/xakelafu/ekhixib/5223669507.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/is_value_dead_again804ia.pdfIn PDF document text
    • http://arendagg.xyz/delorme_inreach_se_planscik8f.pdfIn PDF document text
    • http://fabermanufacture.ru/how_do_you_chant_nam_myoho_renge_kyo_for_moneypune4.pdfIn PDF document text
    • http://tersq.space/62634755286z9uv6.pdfIn PDF document text
    • https://cdn.sqhk.co/tefegegesuxe/cdk5L9I/34404323867.pdfIn PDF document text
    • https://cdn.sqhk.co/fusifanux/ohfhbhe/define_android_obesity.pdfIn PDF document text
    • http://magic-spring.com/kuvupaxanikinmha0k.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/7syribK/gebapaxukivizakari.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/4a9ef800-6829-4ca8-b35b-844ffb195fae/27859669396.pdfIn PDF document text
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_2922b43c09574d99a8d34a77c0934ca1.pdf?index=trueIn PDF document text
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_20ba0d68d6594b6e9d32528f96af4063.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6c28392-0c77-4d64-99a9-2ffa19c185d0/40_rules_of_love_review.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_e83b42ab66374a09b11ff6194d8f04fa.pdf?index=trueIn PDF document text
    • https://206c1dc7-391c-4b20-ac64-b63c97020fd4.filesusr.com/ugd/87773f_54b24198f6cf4846924ceec4e082992e.pdf?index=trueIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_7b32316ffdd04521b91fb37d3486af74.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/96f51b99-6966-4e07-951c-c703bbb6ce1e/joxujomelulevesixozop.pdfIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_09fb8afd2056425da62b4a2f19034d95.pdf?index=trueIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_ef9814c5aac94443859703706e44aad6.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11220 6096 bytes
SHA-256: c9f2692bcaa93941a0a61b9cd8dca2cef820753ce77204cc1a03ed7c8a9e242b
font_01_sfnt_off000126d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D3 12432 bytes
SHA-256: d43df023e62c8ea828358e48c5496a4509f8df57b6249296fb370d3ad4172f5b
font_02_sfnt_off00015147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15147 16356 bytes
SHA-256: e62bf3660f08dc7df2fc467d876eef6c673581c22393168241ecea826ae636db

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