Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2f7acb4b7314c4…

MALICIOUS

PDF

80.2 KB Created: 2021-02-22 15:00:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9365d44e4ba708986b4ec6e0387145d7 SHA-1: af39f3cb4157163a2804bce1b516ac8013f930f5 SHA-256: 6c2f7acb4b7314c4cf0829522541252edc18e7c1d5c06578675f533d82932b91
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to obscure the true destination through a network of redirecting links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=toro+22+inch+recycler+lawn+mower+manual PDF link annotation
    • https://cdn.sqhk.co/sanojuxako/jhfAsqq/60532387244.pdfIn PDF document text
    • https://cdn.sqhk.co/detatakev/XgdTjbB/redude.pdfIn PDF document text
    • https://cdn.sqhk.co/nivurerazusa/icg2Xhy/fitapenul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487186/normal_60082cbca5c4b.pdfIn PDF document text
    • http://fodamibokaf.66ghz.com/75130173469.pdfIn PDF document text
    • http://lafovawolifi.22web.org/z_table_confidence_interval.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_6019814fced9e.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/18qgctC/list_of_all_apps_on_my_ipad_mini.pdfIn PDF document text
    • http://gunisone.iblogger.org/81683993423.pdfIn PDF document text
    • http://matanusebatug.22web.org/lidexoromoloxuposug.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/DhjcShf/54164541599.pdfIn PDF document text
    • http://jijufik.22web.org/coreldraw_x7_crack_free_utorrent.pdfIn PDF document text
    • https://cdn.sqhk.co/bikawegaj/haigsid/xipekupepotu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423137/normal_5ff69cafc1c99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_60152f8e5bb93.pdfIn PDF document text
    • https://cdn.sqhk.co/korokotuduki/diajgid/95007856792.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/gorajikunobixi/sojozem.pdfIn PDF document text
    • http://duvipegi.epizy.com/pokemon_platinum_walkthrough_veilstone_city.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/radejefumasalidofemug.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/47653489146.pdfIn PDF document text
    • http://biwajitakawa.epizy.com/75882771440.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_off0000fd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD74 5136 bytes
SHA-256: 516b04eae97aaf1564dc35732ad34481d8386498344362365cab76c29dec7fb1
font_01_sfnt_off00010ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED9 10604 bytes
SHA-256: e8aa02d7c07d8169891dff02c4f28f4457f9817458f054e6158050dd90397493

Open this report in the interactive analyzer, or submit your own file for analysis.