Malicious PDF — malware analysis report

Static analysis result for SHA-256 302bc29c7dbaf9be…

MALICIOUS

PDF

76.2 KB Created: 2021-04-09 08:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5c6f6ccc93e1f92254380b76a93dde77 SHA-1: 52e32fd6584b14c21a850e6e328e8b872b5a5c2b SHA-256: 302bc29c7dbaf9be5084ef6086cd4763bc815df359a413462f341a2e1f823452
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern. No scripts were extracted, but the overall structure and link distribution are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/strik?utm_term=is+capitalize+a+word PDF link annotation
    • http://allwoman.site/sheet_music_template_pianohe2en.pdfIn PDF document text
    • https://vewevemeza.weebly.com/uploads/1/3/2/7/132741136/suguruto-dunusikakujumot-newegigow.pdfIn PDF document text
    • http://rollernefrit.xyz/70041725920v8317.pdfIn PDF document text
    • http://connexion-amelii.xyz/735845652543b1gy.pdfIn PDF document text
    • http://rte-ita.fun/80428765238ckevy.pdfIn PDF document text
    • http://lezagerodise.iblogger.org/tata_motors_annual_report_2020_19.pdfIn PDF document text
    • http://nicepics.xyz/wikotopafiwavaqs5.pdfIn PDF document text
    • http://yesitalia.fun/135557388741x5bh.pdfIn PDF document text
    • http://redirunna.xyz/cas_lp1000n_label_printing_scale_30_lbs_capacity_0.01lbs_readabilityg7bza.pdfIn PDF document text
    • http://theporte.xyz/how_many_carbs_are_in_one_hard_taco_shelltw554.pdfIn PDF document text
    • https://veriketosamu.weebly.com/uploads/1/3/4/6/134675732/fekerijag.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/7f0c49fe-5d49-4826-b1c3-b54c545c8ea5/silozeliwif.pdfIn PDF document text
    • http://jajujej.rf.gd/31725105206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5abf3ad0-6ef6-47b5-9760-14fc0c918085/bobagopedikirijaxogu.pdfIn PDF document text
    • http://tomosuromiv.epizy.com/55161240486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95048d4-cf32-4387-82ae-2878b2c46436/tulijivunawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ac54be3-6e7a-47fb-b2f3-faaad2000115/7882172461.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/2019_construction_company_profile.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/51361965859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1babd293-9853-4549-877c-ae79c5c661f6/owners_manual_hp_officejet_pro_8600.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_off0000ecee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEE 5144 bytes
SHA-256: 03ae10bf7382285ed841e28c8441051211a2f6872b13c3e21ea6c0af600432cc
font_01_sfnt_off0000fe97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE97 10476 bytes
SHA-256: 7869f959c39062bb32b6c1dd287bb26c0ce8193580716eeaf4e32ea62b30351c

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