Malicious PDF — malware analysis report

Static analysis result for SHA-256 0360f9e6278edbf8…

MALICIOUS

PDF

77.2 KB Created: 2021-06-08 23:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 55e5d81e74f44b243df135e768557ec8 SHA-1: 3d1c6c40b791f6e5bda338a4ca77c55ed584b546 SHA-256: 0360f9e6278edbf84e6df41d89a30bd6c0051f4b90cbeb99a68d3aaf41d07b85
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable hosting, and is flagged by heuristics as a link farm and by ML classifiers as malicious. The ClamAV detection confirms its malicious nature, identifying it as Pdf.Phishing.Trojan. The embedded URLs suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/pbw?utm_term=long+deep+sleep+guided+meditation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494677/normal_60521f11df599.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4479675/normal_60b301fbd40b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446502/normal_5fdbc88c01197.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pejuzor.pbworks.com/f/vizio_sb3651-e6_review.pdfIn PDF document text
    • http://rujuboxu.pbworks.com/f/bivaduno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/203bb8f1-6a2d-43c3-a887-38a56851786c/how_to_make_wood_box_corners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3792b726-9afe-46de-87e1-3907bbec4af5/what_did_gaga_say_in_pet_sematary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/730918fe-a9a4-4500-8af7-16b98c1c392b/felopof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0ae806-4947-4478-84e3-80928ea19946/supizikesabefurimuvod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d66b53b9-15ac-4cfe-bde6-30e382125bb8/15715855709.pdfIn PDF document text
    • http://lururefisu.pbworks.com/w/file/fetch/144599511/beckett_sport_card_price_guide.pdfIn PDF document text
    • http://jiboduxoguv.pbworks.com/f/which_of_the_following_is_a_permanent_method_of_birth_control.pdfIn PDF document text
    • http://zekodunu.pbworks.com/f/dell_latitude_e7440_driver_pack_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/363ae582-eb27-4f9f-8134-0b228f4027a6/what_is_the_beast_from_water_in_lord_of_flies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aca5a21-24a4-428a-a3e9-efbe3c433d3f/sex_education_3_temporada_elenco.pdfIn PDF document text
    • http://rajejor.pbworks.com/f/rojupuxofigawuxiluvifawo.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/f/zifaxuwopavuton.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/w/file/fetch/144869607/sustainability_reports_guidelines_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b35f4ea-abe6-4712-bb08-4c6ab7f8e787/huskee_24_in._2-stage_snow_blower.pdfIn PDF document text
    • http://buluwogot.pbworks.com/w/file/fetch/144603831/8452997828.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/f/avatar_2009_full_movie_in_hindi_dubbed_free_download.pdfIn PDF document text
    • http://vakerul.pbworks.com/w/file/fetch/144513819/what_virus_is_rubella.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/f/xokav.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_off0000f218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF218 5124 bytes
SHA-256: 3d669cc7e20cda60db02737070fb12084c2854c17b576bcfe2c4f05eea04fdd8
font_01_sfnt_off0001037c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037C 10684 bytes
SHA-256: 6cb89ba2f2bec5d2656d7965a056c4650318d175de2ae7ed8f701284743eafd1