Malicious PDF — malware analysis report

Static analysis result for SHA-256 4515f1365fe3c950…

MALICIOUS

PDF

72.7 KB Created: 2021-05-15 10:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3cf85ee7ebccc6f55e00b37011f3c7f1 SHA-1: d7f2713f7c5bcf5cadcffb8d8db73ae9b3c495ad SHA-256: 4515f1365fe3c95068504b77d14006398347da1ded967bbff22337b9a89739d8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://seumenha.ru/strik?utm_term=different+types+of+wiring+system+pdf PDF link annotation
    • https://jikevisanudopud.weebly.com/uploads/1/3/4/0/134017539/6206182.pdfIn PDF document text
    • https://rilodogalaru.weebly.com/uploads/1/3/4/3/134398508/10e2d578.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/nikesire.pdfIn PDF document text
    • https://safejabev.weebly.com/uploads/1/3/0/7/130739713/5155284.pdfIn PDF document text
    • https://dodezugufiz.weebly.com/uploads/1/3/5/3/135331092/24ef95.pdfIn PDF document text
    • https://futokodoneru.weebly.com/uploads/1/3/0/8/130814407/7876040.pdfIn PDF document text
    • https://mujekakuvegaxum.weebly.com/uploads/1/3/2/3/132303245/nidaditekogedizevi.pdfIn PDF document text
    • https://simisodiguguvig.weebly.com/uploads/1/3/5/3/135324772/kimadosolutuzabusaje.pdfIn PDF document text
    • https://jekosupoma.weebly.com/uploads/1/3/1/6/131637113/mekivigifij.pdfIn PDF document text
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/vujitogumateti.pdfIn PDF document text
    • https://tujiniwiko.weebly.com/uploads/1/3/5/3/135350236/nusoj_zobelibu.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/bidurudilidujug/56948033202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0110b307-398b-4d05-987a-1f840309506e/56850145356.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/elements_compounds_and_mixtures_worksheet_grade_8.pdfIn PDF document text
    • http://kavejanunar.epizy.com/44947229181.pdfIn PDF document text
    • http://wifavar.epizy.com/gagalowatizinipat.pdfIn PDF document text
    • http://bibirosomuxir.epizy.com/cell_phone_number_tracker_philippines_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/tracfone_6.4_samsung_galaxy_a20_smartphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f9649fa-645f-4873-bb35-f686ebd23e55/novena_al_espritu_santo_catlica.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3A 5312 bytes
SHA-256: 5316ac30d7bd2925d1ec97be7297c4d70aacfe14b08675f542b554b044112d8f
font_01_sfnt_off0000f15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15E 10544 bytes
SHA-256: 48e97dd279b33977923abb900ae960af00f88864f0516058cc797fc5ded62658

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