Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a60628f2ad1fe76…

MALICIOUS

PDF

80.9 KB Created: 2021-04-20 13:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7595d29e6c672d966ca462db9d42c4e3 SHA-1: 248cd5147eacacb34c5603d67548811bf08a1f2c SHA-256: 8a60628f2ad1fe76223675d55f12cd78f0c0511c92998be1e37a81ea0d5ba1bc
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent URL pointing to a domain associated with phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a specific document title, suggesting a phishing or social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/strik?utm_term=the+laramie+project+by+moises+kaufman+pdf PDF link annotation
    • http://usechambre.xyz/380183498640e5xl.pdfIn PDF document text
    • http://salonly.xyz/88084325147qdphv.pdfIn PDF document text
    • http://scandisvet.ru/joxuputuzugiwufst2yc.pdfIn PDF document text
    • http://damodudajipofem.22web.org/jejosunovadofiz.pdfIn PDF document text
    • http://accueilcmb.com/when_the_lights_went_out_2012_trailerfe19q.pdfIn PDF document text
    • http://suwofuwokenedu.22web.org/50_ejercicios_de_notacion_cientifica_resueltos.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/a2ba66b5-b8a0-4aed-9460-ca62ad81ac8e/how_to_test_accu_chek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/558431b9-e0d3-4e69-8db8-f4cfc62f33b4/how_to_install_adobe_premiere_pro_cc_2020_in_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/why_is_my_mr_coffee_pot_not_brewing.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/nolakegumosoxupapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8480656-e6c2-47e9-a473-07aa9b8b1ec0/what_is_it_called_when_you_put_two_words_together.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/jisajatofezuko.pdfIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_ece8277b30d248968a15cd26107e87a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/the_fall_guy_season_5.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/powinetur.pdfIn PDF document text
    • http://mapesag.epizy.com/partquip_wheel_bearing_catalogue.pdfIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_afb6eb0f72e642bdbb387eca3c2e4902.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuxime/92206844610.pdfIn PDF document text
    • http://somukagokololu.rf.gd/ecology_and_environment_pd_sharma_13th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/92354316694.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_off0000fe66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 5728 bytes
SHA-256: af3e181060737764a450409397d0f7eade270c7d757a3dd7222ebc8696c243f9
font_01_sfnt_off000111b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B7 10688 bytes
SHA-256: 2a91bf8e15f411fbb14e347affaa7dd8694a06d0d5c3920f5f33d9ac60aae490

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