Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ac8f72016094d1…

MALICIOUS

PDF

76.5 KB Created: 2021-03-16 16:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 46dd8df951594893fe5ce13c50fe7a27 SHA-1: 920812ed907377c1de2091dfd2a2d97e360941f5 SHA-256: 92ac8f72016094d1c16e59c27c579d2a4ab79b49cc7120692d0fef131f3676ed
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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/wix?keyword=nj+ultra+festival+marathon PDF link annotation
    • http://sbrf.link/dominos_philly_cheese_steak_pizza_calories_thin_crustf053e.pdfIn PDF document text
    • http://axecheat6.xyz/sawiganoxolekavezudanorord19j0.pdfIn PDF document text
    • http://ellmax-site.xyz/amplificador_peavey_vypyr_75wpupnw.pdfIn PDF document text
    • https://bupafenanibud.weebly.com/uploads/1/3/4/0/134042845/4034186.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/iebKAcv/cross_stitch_masters_club.pdfIn PDF document text
    • https://letunaxure.weebly.com/uploads/1/3/1/3/131383761/42b19.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/hTmZHjh/mine_world_vip_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/4jiwcjh/zosudewus.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/genukopapovixo/omron_model_hem-711dlx_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/chirutha_telugu_movie_songs_naa_songs.pdfIn PDF document text
    • http://numivonef.rf.gd/glencoe_algebra_2_common_core_edition.pdfIn PDF document text
    • http://netifikapiwi.epizy.com/preparation_of_tertiary_butyl_chloride_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/womugokumoxev.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/how_would_you_describe_sunset_boards_cash_flows_for_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/65015001290.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/servant_of_the_guide_meaning_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/man_looking_back_meme_origin.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_off0000eb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB25 5112 bytes
SHA-256: b21bb02c9b01d1ac7eea58018aad53aafcff3c0ece8baac053b7f6afc0b3899b
font_01_sfnt_off0000fc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC71 11812 bytes
SHA-256: 4942a477f0a6eebfbd58705bef115e3a4aeea4ec40e5935d840c06f48c651709

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