Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3018f4ace976fd…

MALICIOUS

PDF

76.5 KB Created: 2021-03-26 03:32:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: aa94a3aec05b0fd1b9d157f2e42746f1 SHA-1: 89424869a664b8ca8e64d229c1c0710bcdb19557 SHA-256: fd3018f4ace976fdd7d4ce18eb7e8bed6d8c5c950e70daf87e2413a364338231
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, hosting numerous links on disposable domains, with a high concentration of external URIs pointing to suspicious domains like midufefew.ru. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/strik?utm_term=wand+of+horus+stargate PDF link annotation
    • https://cdn.sqhk.co/lewovazu/idMgegc/39129628016.pdfIn PDF document text
    • http://bizbize-yeteriz.org/audatex_estimating_software_freer5z58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413347/normal_6048505327f65.pdfIn PDF document text
    • http://center-about.com/tuzitasepipakukuzutv4s7s.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/gjhKRgh/ccip_insurance_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fca0423622ce.pdfIn PDF document text
    • https://tekagegi.weebly.com/uploads/1/3/2/7/132740997/sibafen-gelewodej.pdfIn PDF document text
    • http://raftgjgr.space/tarot_cards_3_card_spread_yes_or_no59zzx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415045/normal_6015ef4c4fcbc.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/RnoKhcV/traffic_rider_hacked_version_apk_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_6056e710d8ae3.pdfIn PDF document text
    • https://birobidusizal.weebly.com/uploads/1/3/4/6/134638138/mopabuwodased.pdfIn PDF document text
    • http://nuselobire.22web.org/22610357853.pdfIn PDF document text
    • http://stavki.link/70023981462ex367.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/cWAicjb/cvs_caremark_prior_authorization_form_for_saxenda.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/iagSJyY/the_lighthouse_cafe_san_pedro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454161/normal_6046f66b4fed8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f08d83-2e65-465a-8ff9-493deb88b518/is_wendys_chili_good_for_a_low_carb_diet.pdfIn PDF document text
    • http://gesumorazawetum.rf.gd/unstoppable_god_elevation_worship_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8bdc5fa-b589-4cda-b4f8-8f456b70a19f/inductive_analysis_in_qualitative_research.pdfIn PDF document text
    • http://degedudu.rf.gd/71882302022.pdfIn PDF document text
    • http://gizadopozi.epizy.com/89176251030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17145fdf-cb55-4c30-ac4b-ea02029daf3a/pojumusogiligadido.pdfIn PDF document text
    • http://kojaburu.epizy.com/cisco_webex_plugin_internet_explorer.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_off0000ed92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED92 5148 bytes
SHA-256: 63ec655edef7b0340e7ec9a5cde363bce1c538a04400912d88ee710c2341336b
font_01_sfnt_off0000ff23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF23 11144 bytes
SHA-256: 6cdccededdc1bac3b0019383baba5e57ddcac5574bf8f93c37681360fb1cbe91

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