Malicious PDF — malware analysis report

Static analysis result for SHA-256 f542ca28a822cb52…

MALICIOUS

PDF

84.0 KB Created: 2021-05-22 10:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 38c3d73aabb6bd732d858ef1be8e89e9 SHA-1: bc4c9f257595b908abfd2cf2d710cf06b488c57e SHA-256: f542ca28a822cb52d171330d3e3ac361ee699af74bf959431ceb67898a72aff7
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to S3 buckets with seemingly benign filenames, but one prominent link redirects to 'pelibifir.ru'. This domain, along with the UTM parameters in the URL, suggests a phishing or malicious redirection attempt, likely disguised as a lure for 'agyaat 2 full movie hd'. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://pelibifir.ru/strik?utm_term=agyaat+2+full+movie+hd PDF link annotation
    • https://dagatofolake.weebly.com/uploads/1/3/0/8/130874029/5051345.pdfIn PDF document text
    • https://pojoguteguv.weebly.com/uploads/1/3/5/9/135996175/437579.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bipepezuwed/sad_love_whatsapp_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/what_legislation_did_the_care_act_replace.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/9212784173.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/gexewetopo.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/wozerogomivagagewodis.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/kifugugemedatedizako.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/machine_learning_with_python_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/thesis_writing_style_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/how_to_calibrate_masterbuilt_electric_smoker.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/sutewibigesizari.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/japanese_flowering_cherry_tree_information.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/3286249420.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/freckle_juice_art_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/80638127753.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/nikon_d60_af-s_dx_vr_nikkor_18-55mm.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/badshah_movie_songs_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/conditionals_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/20680158847.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/situation_analysis_marketing_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/independent_contractor_letter_of_agreement_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5F 5108 bytes
SHA-256: 2bf3f7eb8d7bd4544a65a64f4655c4302cbf7eddb6129822eff4b7ea69fcd0de
font_01_sfnt_off00010cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD9 12120 bytes
SHA-256: c26933a9a73e328fc7cc1f63d8ff6be8cc9d3a49124fe111621233ce627efeac
font_02_sfnt_off000134cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134CD 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333