Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa546676d942190a…

MALICIOUS

PDF

83.5 KB Created: 2021-02-26 14:12:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 225f31ebab558c886bd7bebda1844772 SHA-1: acec1e33005a06d83aa73d4da9fcdf5e98f6ed86 SHA-256: fa546676d942190a1afe659b16194d4d9448da37355f206c7cd4a68d821f6505
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://baarspo.ru/123?utm_term=garmin+etrex+12+channel+gps+price PDF link annotation
    • http://galosidijixiwu.mypressonline.com/how_to_study_the_bible_for_beginners.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/81039852655.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/72488140337.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/gawufibokutuxofed.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/ahgEfhZ/69767491785.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/jaE1jgP/idol_beauty_shop_apk.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/how_to_get_a_private_investigator_license_in_georgia.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/pobuzakivararetid.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/second_phase_of_green_revolution_in_india.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409102/normal_6015f4755df61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485440/normal_5fc70224593b8.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/what_is_the_best_poem_of_jose_rizal.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/how_to_check_my_post_office_account_online.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/vufupu/83569717692.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/medial_cuneiform_fracture_recovery_time.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/navy_advancement_center_pensacola_fl.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/48866804459.pdfIn PDF document text
    • http://duvodix.myartsonline.com/star_trek_enterprise_cast_season_3.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_off00010a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0B 5632 bytes
SHA-256: b9303a704c03e7579e5c42af5b0174f0d46607edb6324220bf7d7b454e0247c0
font_01_sfnt_off00011d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D15 10476 bytes
SHA-256: f8bd2601340bd96aaf1e7c45a39fdf51f219dafef75c169cb081acb676dff115