Malicious PDF — malware analysis report

Static analysis result for SHA-256 c046a7cc8cde315a…

MALICIOUS

PDF

73.8 KB Created: 2021-06-06 00:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8fae8bb9d62b50195fdef08f45c394a0 SHA-1: 0214224ffd44144ddd6308d056a01ac97361f95a SHA-256: c046a7cc8cde315a8415420285793bf7ed31d844653482bfab84a80fee19796f
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are hosted on disposable domains or used for SEO spam. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it functions as a lure to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://cructi.ru/pbw?utm_term=extremely+loud+and+incredibly+close+book+genre PDF link annotation
    • https://zurowesijeja.weebly.com/uploads/1/3/4/6/134630916/sawuwukawebe-kukararewolaba-buwoga.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/gepib_vavegezusodasaj.pdfIn PDF document text
    • https://lufojegixibebaz.weebly.com/uploads/1/3/1/4/131407324/tevavaluli-niwikid-dufilila.pdfIn PDF document text
    • https://fovivijidilel.weebly.com/uploads/1/3/4/8/134888041/kabexirazol.pdfIn PDF document text
    • https://rulafusojuxibaw.weebly.com/uploads/1/3/4/2/134265871/38456f78cd9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavijusana.pbworks.com/w/file/fetch/144657384/gunaminejeviliful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/177de6f3-77d0-4440-910a-42cd9218cf0b/sisowibigirolizeje.pdfIn PDF document text
    • http://natizasex.pbworks.com/w/file/fetch/144578349/phrasal_verbs_with_go_worksheet.pdfIn PDF document text
    • http://neruwuk.pbworks.com/f/jerupowo.pdfIn PDF document text
    • http://jubujefaj.pbworks.com/w/file/fetch/144626268/10260813270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af437dc-5a12-43b6-a5d5-4e5dd6bbff89/53412565974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14edfc26-456a-4073-a5f2-d9b2783319a4/python_sklearn_decision_tree_classifier_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d51f9ba4-78bf-4173-a35e-2a690d62bd4a/92834044629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2d1d979-2184-4063-956a-0fbeec42208e/33933124376.pdfIn PDF document text
    • http://bojifimaral.pbworks.com/f/vozanexifagugema.pdfIn PDF document text
    • http://jetipufagi.pbworks.com/w/file/fetch/144437322/google_play_gift_card_generator_apk_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f55f05ad-0e28-4be6-b8ac-a0dc4b95e468/45087333634.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/f/sidusuzeba.pdfIn PDF document text
    • http://gabumur.pbworks.com/f/bobcat_743_parts_manual_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e0b97b1-b345-4a25-94e0-892ca2c91ea1/navy_seal_salary.pdfIn PDF document text
    • http://nozobitativi.pbworks.com/f/como_se_reza_un_rosario_para_los_difuntos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/251a6e72-1dc5-4c37-ba1c-f51b9dd9a69f/wuwaxidub.pdfIn PDF document text
    • http://tufukamapaf.pbworks.com/w/file/fetch/144686199/3_phase_induction_motor_winding_calculation.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_off0000e02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02B 5592 bytes
SHA-256: ca7872e1c3dde31d173071b88c8e1636d0628806eea363dcb1a2b2dc55fecf53
font_01_sfnt_off0000f32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32F 11316 bytes
SHA-256: c220606afc8c19a7b7556daf864e920e9cad1ac578d6f57c240f8a82ceeb94b6