Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb83c929619a01fd…

MALICIOUS

PDF

66.3 KB Created: 2021-06-05 19:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 466a294c5c3c3ab97e4dd1b40782b02a SHA-1: 66f3eece0bc7d6be5ff3ed9e4910d4e6387dc160 SHA-256: bb83c929619a01fd10b6022fc3df66e3228791b866bf3acdea866460357d8080
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.8462

Heuristics 5

  • 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
  • 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://allytemp.ru/pbw?utm_term=factorizacion+de+un+trinomio+cuadrado+perfecto+ejemplos+resueltos PDF link annotation
    • https://direvegafazago.weebly.com/uploads/1/3/4/4/134491376/7355312.pdfIn PDF document text
    • https://birafuwufejutik.weebly.com/uploads/1/3/4/5/134598964/banel_nogepememize_xavomopadukokez.pdfIn PDF document text
    • https://vudufidobisij.weebly.com/uploads/1/3/4/6/134673615/a4bd475a848a2.pdfIn PDF document text
    • https://mamonujiduvef.weebly.com/uploads/1/3/4/5/134525279/e2a45b.pdfIn PDF document text
    • https://lereviripos.weebly.com/uploads/1/3/4/6/134663640/besewuboxen.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/079e038f6718.pdfIn PDF document text
    • https://nuwoveforu.weebly.com/uploads/1/3/4/0/134099073/4205957.pdfIn PDF document text
    • https://tagopudul.weebly.com/uploads/1/3/5/3/135392217/978a6.pdfIn PDF document text
    • https://fivipogokofabid.weebly.com/uploads/1/3/0/7/130776003/semedupudatigi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144427302/how_to_prepare_moringa_tea_for_weight_loss.pdfIn PDF document text
    • http://lodenapokot.pbworks.com/f/vanerinumerurag.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144418500/rosovividositubali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c419f5-5587-439a-8d4d-48f2710932b0/netgear_ac750_wifi_range_extender_setup_ex3700.pdfIn PDF document text
    • http://genarozep.pbworks.com/w/file/fetch/144522267/21738315958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5366e711-3e06-4f37-836f-b7169fbb6671/mupetewosifafigovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe6b127-b00c-40ee-9f5d-a1ab6250b09e/70949529548.pdfIn PDF document text
    • http://gutupum.pbworks.com/w/file/fetch/144634038/26487106420.pdfIn PDF document text
    • http://vazesuna.pbworks.com/f/how_to_be_good_at_modern_warfare_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af687cd2-ac3a-42a1-87d6-a92b46eb0e12/ham_radio_technician_license_study_guide.pdfIn PDF document text
    • http://gozuwef.pbworks.com/w/file/fetch/144505830/bloons_td_battles_mod_ios_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6254551b-e99a-4c16-b5b7-5f856993aed3/disgraced_play_ayad_akhtar_characters.pdfIn PDF document text
    • http://wufamazajo.pbworks.com/f/segunda_condicion_de_equilibrio_ejemplos.pdfIn PDF document text
    • http://didaneguk.pbworks.com/f/50989855438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c63efa2c-018f-49b3-a3ed-16af74a09d4c/hp_elite_7100_mt_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d9b655e-8df9-4c94-8254-1c85bdb4cc4c/what_does_caliphate_mean_in_arabic.pdfIn PDF document text
    • http://tujelupirobe.pbworks.com/f/descargar_geometry_dash_2.2_apk_para_pc_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc38a07-5e84-4f3a-a791-1707d5c12846/zijiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b60e15-fbbf-431b-b87a-33ffa08cdd28/pathfinder_physics_book_download.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE739 5264 bytes
SHA-256: 8dc048722e8b9fdded3ace7f4685d3dbd8b37b4e965a66452c25605af418e7b5

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