Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37107c0417a8286…

MALICIOUS

PDF

83.3 KB Created: 2021-02-28 01:30:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c2440ee4ede747aa69f1d850d404aadd SHA-1: 7c3bf177be002d6117ef9dd2d98ded5daa0fe13a SHA-256: f37107c0417a8286e512cef091d06c52400eecd4b22e578dc339d636960d42bd
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as a link farm, containing numerous external links to other PDFs hosted on disposable domains. The ML classifier and ClamAV also identified it as malicious. The primary URL, 'https://fokemale.ru/strik?utm_term=why+does+my+honeywell+heater+keep+turning+off', suggests a potential phishing or scam lure, disguised within SEO-optimized content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/strik?utm_term=why+does+my+honeywell+heater+keep+turning+off PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453553/normal_5fcf78f07931a.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/2gd6ihO/rowdy_city_wrestling_mod_apk_unlimited_money_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/CTehjid/69509530492.pdfIn PDF document text
    • https://tovijivesigaz.weebly.com/uploads/1/3/5/3/135327805/2bf47643.pdfIn PDF document text
    • https://nipufosuvomabuz.weebly.com/uploads/1/3/3/9/133999137/rigopijejonebal-litovufokogo-jodul-bewixonumede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452169/normal_5fda4cdb1b2d5.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/Ls1gj8W/cricket_live_match_2020_ipl.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/jfjwggN/8754302582.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393349/normal_5fff5c6c4e742.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/fhjMSid/fepasixuwubupejotadijaji.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/1222956.pdfIn PDF document text
    • https://cdn.sqhk.co/powedaguja/hdpuCjh/baby_girl_carter_s_hooded_dinosaur_jumpsuit.pdfIn PDF document text
    • https://cdn.sqhk.co/sakupiraf/ejjjbja/vitupiriwasob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_6020191c6acf3.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/YcjfAdS/23437281759.pdfIn PDF document text
    • https://sizamuvexiluti.weebly.com/uploads/1/3/4/6/134644091/xufumaj.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/fixararololu/manual_astra_hatch_2001.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/bushey_meads_sixth_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/mebejuruwakofumiki.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_off000108ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AE 5724 bytes
SHA-256: 1d1a4708949685a6f2cc45e09debd680a020e5b835b741fb1b276486b2274fd1
font_01_sfnt_off00011c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C28 10444 bytes
SHA-256: 1639ff1937291b6bd625efbf935dce68df979921d1e7e16c7cc6cbfdfe5e06aa

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