Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ccb091922cdb79…

MALICIOUS

PDF

82.3 KB Created: 2021-04-04 12:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33af12488bc1afb4b0c7ff2d0970df4f SHA-1: ee5c2a42706057389c777149fb4a464d00c8cb88 SHA-256: 34ccb091922cdb79d81e5cf3211d642d074375863a37ed1a099946aa160ef3b2
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 by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the nature of the link farm and the PDF format itself often leverage embedded JavaScript for redirection or exploitation, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wix?keyword=ironing+board+cover+bed+bath+and+beyond
    • https://cdn.sqhk.co/kevovevude/hjdijbT/eye_catching_poster_templates.pdf
    • https://cdn.sqhk.co/molewekane/e4Ehf2U/free_poker_app_with_video_chat.pdf
    • http://rajenajodaf.iblogger.org/construccion_de_techos_verdes.pdf
    • https://cdn-cms.f-static.net/uploads/4424330/normal_602aa576ea86c.pdf
    • https://cdn.sqhk.co/sinemajud/gidQsM9/56892621116.pdf
    • https://cdn.sqhk.co/bujasugawo/ifIZgc1/17019865465.pdf
    • https://cdn.sqhk.co/kuwusemob/Cnjdbf2/international_marketing_notes.pdf
    • https://cdn-cms.f-static.net/uploads/4463263/normal_603a6ea4ca6ac.pdf
    • https://cdn.sqhk.co/norowitidot/gi2K1hg/4859373780.pdf
    • https://cdn.sqhk.co/kufagilan/gWsirjd/90261818053.pdf
    • https://cdn.sqhk.co/mujawiru/hrijgi9/9856630502.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sagalesokalu.epizy.com/dekaron_rising_ak_guide.pdf
    • http://fezowogemojuma.epizy.com/sosifenegitaxuzibalavexo.pdf
    • http://rewelopax.rf.gd/rt-n66r_vs_rt-n66u.pdf
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_d4e5b8f0b2b449578df143a3904ca9c1.pdf?index=true
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_33f60d4970a24548b129e970b85508e3.pdf?index=true
    • http://kusotuwomaru.epizy.com/autoroute_france_trafic_information.pdf
    • https://9c33b4df-6f14-41ad-9e94-a3a23f7ed20d.filesusr.com/ugd/2a975f_d57202bdb8df43bf8f88b3e92dc59623.pdf?index=true
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_025028267368474c95ca8d46421ae3e8.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb86.bin
df17d744835b4fbbd1d970851408f34e3cd803a1b7a3da49fd873c0d8ccc4595		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 5228 bytes
font_01_sfnt_off0000fd59.bin
3da9452823c224c1b9f8c2cd897c0f75a9a8a52232a595298ce3e5d546b80ec8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD59 11432 bytes
font_02_sfnt_off000124a9.bin
10c941b8e150654bd5064cadd75ea78825c9277c873182c21e5fbf45442fdeec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124A9 16208 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.