Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb8e2c7310c2a1d…

MALICIOUS

PDF

82.0 KB Created: 2021-03-12 13:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a856f9b25aca5580736a6c83cae53ab9 SHA-1: dfeac3d9ca53699091e1e2c1926fb206544d0d54 SHA-256: 6eb8e2c7310c2a1dba0c33ad2e98ad375c2ab1338f19cad23da138a6de789ff3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to direct users to malicious or deceptive content. The ClamAV detection and ML classifier also indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/award?keyword=endometriosis+pdf+tratamiento PDF link annotation
    • http://linefofaxugedu.mywebcommunity.org/44839060253.pdfIn PDF document text
    • http://instapriz24.online/18557457383fujrz.pdfIn PDF document text
    • http://tokio-2020.fun/fufamixis8i71.pdfIn PDF document text
    • http://jigapenufi.medianewsonline.com/how_to_start_gas_fireplace_without_key.pdfIn PDF document text
    • http://crysety.xyz/kupabuwoijw.pdfIn PDF document text
    • http://rcasino.info/canon_powershot_elph_100_hs_user_guidef35ls.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/minobosifozugatologidofap.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/marketing_segmentation_targeting_and_positioning_case_studies.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/38247640467.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/86799832592.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/define_crystal_form_scientifically.pdfIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_a3a6b54ca81a44d5ab26c22c1b09e49b.pdf?index=trueIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_230c9bb980fe4b87a115bf9db8f5fb93.pdf?index=trueIn PDF document text
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_94289ac8d67a4f5abe7ce83368811b66.pdf?index=trueIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_5917e38a260847489e4bf8fb1c521990.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/pujur.pdfIn PDF document text
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_09042cf6365a48b782e50272b02ab0fe.pdf?index=trueIn PDF document text
    • http://vubelifijam.atwebpages.com/mozogem.pdfIn PDF document text
    • http://dapekafuxururo.myartsonline.com/clases_sociales_del_modo_de_produccion_comunista.pdfIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_9eb70a80cc9c4348a80df5708dfb24ec.pdf?index=trueIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_8e0e89808ed14ab485ac4ba2ce849f70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/sedugerusepiwaj.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_off0000faf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF1 5112 bytes
SHA-256: cabbc430bee8147a736fe50edba6ca5522e45ab2b228b1791c5209eadd40fcd9
font_01_sfnt_off00010c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C40 14840 bytes
SHA-256: 0001a64957b5726300170106c7f374a12b8440c5e02a529c32a737a0c11ab088

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