Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed0b4e4f6aabb74…

MALICIOUS

PDF

74.1 KB Created: 2021-03-02 22:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1812324625768732eb95598eb2291471 SHA-1: 8e5266080031a7b2f40ce3c5a58f56025a0ddf5d SHA-256: fed0b4e4f6aabb7449b27d3b4fc21400f526703033e739f45b3263a619258eb7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9999

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://golowaki.ru/wix?keyword=patagonia+torrentshell+size+guide PDF link annotation
    • http://card2card.live/dragon_ball_z_manga_soldluy1m.pdfIn PDF document text
    • https://cdn.sqhk.co/difakezil/Tskjfxf/home_assistant_docker_update_script.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/jawaluwusiwapelokowol.pdfIn PDF document text
    • http://getplafond.xyz/duvedarpwsx6.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/msi_970a-g43_cpu_cooler8u3uu.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/ShcWgix/word_master_document_table_of_contents.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463263/normal_5fcbb85e9fa0c.pdfIn PDF document text
    • http://bazazodagipaju.22web.org/gatotkaca_in_depth_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5fd2d7e71da6c.pdfIn PDF document text
    • https://cdn.sqhk.co/vavusiwi/ZPhsNjb/space_time_continuum_bowling_ball_review.pdfIn PDF document text
    • http://tesocoin.online/94353769947c3m1e.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/pewibim/21155907898.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/how_the_grinch_stole_christmas_nbc_2020_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/free_border_template_s.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/alfred_hitchcock_psycho_music.pdfIn PDF document text
    • http://zinizebaki.epizy.com/3d_max_basic_tutorials.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/basic_laboratory_safety_rules.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_off0000dcdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDF 5140 bytes
SHA-256: bd50442efea998264ac4854b051304184b29761c9e6f31ff9cfa752dd56f9916
font_01_sfnt_off0000ee57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE57 14372 bytes
SHA-256: e5c82e916d3bb89f8214045696d5dc9a14feb4c13ee3e44f23c50b7255d3dfbb

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