Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30277ab0d9cc268…

MALICIOUS

PDF

94.8 KB Created: 2021-02-14 14:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9fe7135f6570fae74839b0fb9244329 SHA-1: d6e18e7a35168d8d11bb25bb18ab665b609d96ff SHA-256: f30277ab0d9cc268d95e16c38672b61ec6f0dc0e4aaa1704fb47640f3f3d3046
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards malicious intent, likely related to phishing or SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=solving+systems+using+substitution+worksheet
    • https://sibibogug.weebly.com/uploads/1/3/5/9/135990875/kaligujiwowa-lufaponaja-vipewor.pdf
    • https://wipemaxo.weebly.com/uploads/1/3/5/3/135345075/mitikaxitoxa-xobasiwi-loroxokejowuva-misojejukepuvob.pdf
    • https://cdn.sqhk.co/lotivadafe/haQsJhb/photo_editor_change_background_color_online.pdf
    • https://cdn-cms.f-static.net/uploads/4420451/normal_5fe8259ab6308.pdf
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/1949749.pdf
    • https://cdn.sqhk.co/kaxovugefulo/d8OUpge/coffin_dance_fake_call_number.pdf
    • https://static.s123-cdn-static.com/uploads/4420029/normal_5fe41c6996356.pdf
    • https://cdn.sqhk.co/rorazelesu/ih1fIgf/ratiwepulibujewizogopolo.pdf
    • https://gobadinemi.weebly.com/uploads/1/3/5/2/135299992/5656528.pdf
    • http://kelepajalimax.iblogger.org/eclipse_checkstyle_create_formatter_profile.pdf
    • https://cdn.sqhk.co/figotabam/CfThij5/the_oregon_trail_american_settler_apk.pdf
    • https://cdn.sqhk.co/vuritukupus/fghQjeM/radha_krishna_tv_serial_photos_hd.pdf
    • https://cdn.sqhk.co/soxobiwefili/fMSs9eY/football_games_pes_2015_free_download.pdf
    • https://cdn-cms.f-static.net/uploads/4388037/normal_6012e234750c2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fididebezewigex.epizy.com/amplifier_video_song_djmaza.pdf
    • https://s3.amazonaws.com/wutisigila/determiners_and_quantifiers_exercises_with_answers.pdf
    • http://kurejaj.epizy.com/57466899293.pdf
    • 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_off00012174.bin
e3000444e719b6ed1e1348650eff2737e6a2bb488d26887a00f69bdfc898e760		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12174 5448 bytes
font_01_sfnt_off000133ef.bin
a53c762ad8ff4eeced47396d5710c2c1b8d7067bedb92ed4d5bec01df21c0c11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133EF 10756 bytes
font_02_sfnt_off000158ea.bin
713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158EA 16060 bytes

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