Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05281321d673165…

MALICIOUS

PDF

89.0 KB Created: 2021-04-16 00:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 82c5d08ce60cfe1e230e4b74a881cf54 SHA-1: 4059af3282e67309ed4ffda8c78b985da9b8995a SHA-256: e05281321d673165e6645d9d5bba83601b680c231b3c20e1c686e56818332ae3
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, potentially exploiting PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=assuntos+de+historia+enem+2019 PDF link annotation
    • http://devlp.club/43631012872mrf2.pdfIn PDF document text
    • https://soxagunolipug.weebly.com/uploads/1/3/4/8/134887217/jegedozuvojedi_xexoweni_zenuke_wanazuvatatuno.pdfIn PDF document text
    • http://jumpfs.space/xuxomifoseyo6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451927/normal_600f2ee61bdcb.pdfIn PDF document text
    • https://zogoporev.weebly.com/uploads/1/3/1/3/131381602/rigovusoka_kotusitavix_berozulanasuw.pdfIn PDF document text
    • http://kasyanbeauty.com/7887852937ptqd6.pdfIn PDF document text
    • http://kwini-fini.online/neurogenic_bladder_dysfunctionhri2h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392215/normal_603f2f3e4f85c.pdfIn PDF document text
    • https://tojezupemizeraw.weebly.com/uploads/1/3/4/6/134629845/wuseruperu-fumajulefela-kebagelekuketup-molab.pdfIn PDF document text
    • http://galoomer.online/503187792166mkg5.pdfIn PDF document text
    • https://runewabelew.weebly.com/uploads/1/3/0/8/130813516/kilosoka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_600d50a18a8ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449187/normal_6038c5555b852.pdfIn PDF document text
    • https://momuxubodi.weebly.com/uploads/1/3/1/3/131379397/1331114.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474723/normal_5fec7d23dc519.pdfIn PDF document text
    • http://tikovg.xyz/defarogoximezunowijubogibp93wf.pdfIn PDF document text
    • http://damvglaz1.xyz/good_canon_camera_for_wildlife_photographywjckm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xumuritikoxuk.myartsonline.com/992220054.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/how_to_change_an_actuator_valve.pdfIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_03b947bd721b4d45a3adbd41679fa469.pdf?index=trueIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_28a5adf03bff4844964526ddb142d042.pdf?index=trueIn PDF document text
    • http://rukosivujuxu.atwebpages.com/what_to_do_when_water_spilled_on_laptop_keyboard.pdfIn PDF document text
    • https://0f3c41ac-de96-4ba7-a517-026d7435d592.filesusr.com/ugd/8631de_f75e6d6a09714739bb6df356641cff30.pdf?index=trueIn 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_off00011960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11960 5504 bytes
SHA-256: 2dfd9e1e99f110f30cdd15565f9286827e324d6c31183f833127b8420faecbae
font_01_sfnt_off00012be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE4 13680 bytes
SHA-256: 7ec71bca21d781158b14f64f3f38d539f5a282f776b7ce27da2b10c3e90d3adb