Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9e9a5abc1b2734…

MALICIOUS

PDF

75.5 KB Created: 2021-02-17 20:04:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dd767c1bea5b3fc2d0339b43e6e81971 SHA-1: 6a594f5963e8d5b0f9409a9f5153db86b5e2d2a6 SHA-256: ee9e9a5abc1b273411476aa66d7371c895052df0827649b2f34e9bd589278d55
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. Heuristics like 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/aws?utm_term=what+does+courage+mean+in+the+bible PDF link annotation
    • https://tetoxoji.weebly.com/uploads/1/3/0/9/130969306/bepawafagebe.pdfIn PDF document text
    • http://itwomen.space/2000_cushman_turf_truckster_manual1t7t6.pdfIn PDF document text
    • https://wugebanog.weebly.com/uploads/1/3/4/7/134709888/458968.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/bodumowego.pdfIn PDF document text
    • https://zekufizow.weebly.com/uploads/1/3/0/7/130775694/rexemavojetu.pdfIn PDF document text
    • http://gidilixad.66ghz.com/55496120465.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/ribotolejaz.pdfIn PDF document text
    • https://mikatafa.weebly.com/uploads/1/3/1/3/131398449/zasadugep.pdfIn PDF document text
    • https://biziliwedurukax.weebly.com/uploads/1/3/4/8/134889104/dimidizutoxuko.pdfIn PDF document text
    • https://jafipununevov.weebly.com/uploads/1/3/0/8/130814040/0b0dc4bcb.pdfIn PDF document text
    • https://mugafurevokez.weebly.com/uploads/1/3/4/8/134894013/gakotedavizud.pdfIn PDF document text
    • https://kajovagej.weebly.com/uploads/1/3/4/7/134747054/547d6907a8c50f8.pdfIn PDF document text
    • https://suzotavuni.weebly.com/uploads/1/3/4/7/134765747/rinulim.pdfIn PDF document text
    • http://all-system7.xyz/57927665798f3ep1.pdfIn PDF document text
    • http://wildboost.club/fundamental_forces_worksheet_answerswp1i5.pdfIn PDF document text
    • http://dulexip.22web.org/lol_dr_mundo_jungle_guide.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/viromibukoleliw/45012297668.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/govozumatidewomosapulonit.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/69179445306.pdfIn PDF document text
    • http://pasalalu.rf.gd/sojelejugapuganojujew.pdfIn PDF document text
    • http://favekagopu.epizy.com/abdominal_compartment_syndrome_guidelines.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_off0000e862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE862 5508 bytes
SHA-256: 085dc8f34f84aea53a75a360378b6f5e6196d08f77174417d759b3de7fec68bf
font_01_sfnt_off0000fafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFB 10848 bytes
SHA-256: 88eb24b52fefc14af7ebf8c7a7bac7df9a5e234b5c0d9236b912e547202155dc

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