Malicious PDF — malware analysis report

Static analysis result for SHA-256 35eeaf3f9832c83a…

MALICIOUS

PDF

76.8 KB Created: 2021-04-30 19:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cd1e2a21ed9120ef829559fbe9f9eff2 SHA-1: 9eac1d2d48b1a7d9c33dd8fcd25acfb7803b9756 SHA-256: 35eeaf3f9832c83a62bbde936fbebd27509e9f072e1397a1822e31f0c8b8b3cd
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one prominent URL pointing to 'baarspo.ru' which is flagged as a potential phishing or malware distribution site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further suggesting malicious intent. The ML classifier and ClamAV detection strongly indicate this PDF is malicious, likely used as a lure to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/strik?utm_term=kitchenaid+ksm105gbcmc+5+quart+tilt-head+stand+mixer+%2524280+amazon PDF link annotation
    • https://cdn.sqhk.co/bagadogod/egghaNr/jofexo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443329/normal_600871a827a48.pdfIn PDF document text
    • https://kavosimodo.weebly.com/uploads/1/3/4/9/134901779/c498a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490121/normal_60684a2645d29.pdfIn PDF document text
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/roxumanuzisudowik.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/Ijhd1gj/minecraft_pocket_edition_lite_app_store.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366995/normal_5feccc8776d7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418167/normal_604e5f896ee69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453730/normal_605d9374ee16d.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/iThjidw/police_car_driving_in_city_mod_apk.pdfIn PDF document text
    • https://naboparukoxe.weebly.com/uploads/1/3/3/9/133997388/9799450.pdfIn PDF document text
    • https://burakatotofok.weebly.com/uploads/1/3/1/8/131871829/lifozapubabejeno.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/wenobagupexekap/89729787596.pdfIn PDF document text
    • http://jogubemiviju.rf.gd/55723651780.pdfIn PDF document text
    • https://1a413096-4115-453c-84a6-e19f3d0a1e7a.filesusr.com/ugd/4a2d03_ccd372e89ceb486ea1dcfc35b82c1751.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/counter_strike_condition_zero_free_utorrent.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/belajar_gitar_bass.pdfIn PDF document text
    • https://43a98339-0465-49d0-a416-8cef4780896f.filesusr.com/ugd/89258f_28fd448a3ffa4ca6ab43758e7880c257.pdf?index=trueIn PDF document text
    • http://pewizofiwerobep.rf.gd/bootstrap_4_news_template_free.pdfIn PDF document text
    • http://zuzumijeragevud.rf.gd/22441258219.pdfIn PDF document text
    • http://lupunajanap.epizy.com/gebipezidusaw.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/fundamental_organic_chemistry_book.pdfIn PDF document text
    • http://zukepevip.epizy.com/baxiruxitaresubelonum.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_off0000e7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AD 6684 bytes
SHA-256: 1f7e8fa56a6d191b3b73738c0da9821f4300e2daeacee3a7790e724f2cfb74b3
font_01_sfnt_off0000fe4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4E 10712 bytes
SHA-256: d86caa2770b0341283fd7ff3df28be0709423d6596be30bca197bce791462adb

Open this report in the interactive analyzer, or submit your own file for analysis.