Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e70d2744ba5af20…

MALICIOUS

PDF

74.4 KB Created: 2021-06-13 22:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f12868f967780d9f657fb341e9c4eb61 SHA-1: 0b353ddab7c8bcbc6cb717c4a06060a13ffda21c SHA-256: 5e70d2744ba5af20492719197432f33332dd712e6eead8b16b13238a79283424
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains an embedded URI pointing to 'https://huntic.ru/pbw?utm_term=best+random+chats', which is indicative of a phishing or malware distribution attempt. The PDF also functions as a link farm, further supporting its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://huntic.ru/pbw?utm_term=best+random+chats PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/da1d9416-1294-43f2-ad63-f8e026177df3/is_touch_free_or_soft_touch_better.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/w/file/fetch/145065006/jisafanenobiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c10bd690-9f7a-4c7e-9d0b-f3552b9bda1b/jokavunedenimal.pdfIn PDF document text
    • http://nimogomaw.pbworks.com/f/how_do_you_do_a_back_handspring.pdfIn PDF document text
    • http://larabefejaji.pbworks.com/f/wimineniwewusum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f20d081-0c10-4c53-833d-31e893110e56/fejunugebobebokajakidar.pdfIn PDF document text
    • http://garifukedako.pbworks.com/f/how_to_lookup_a_license_plate_in_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2746c44-356e-41f5-aeb9-22756dfa4ab7/betulusixolujovuj.pdfIn PDF document text
    • http://mavujorar.pbworks.com/f/nintendo_switch_emulator_apk_for_android.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/w/file/fetch/144790434/33706572323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971d922e-e985-4b80-8ffd-6cc996fd464b/8-4_practice_b_angles_of_elevation_and_depression.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b24a493-a786-46ae-b3e2-832ae6b960fa/pofiwatepetatirogaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a74763-f0d9-4459-9c7f-5082de206e72/vetomovofazuxuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d971f36-b298-459a-abc0-02e228d60d33/what_items_are_gluten_free_at_taco_bell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71677384-3874-43d9-8419-7ad6326c12a8/the_book_thief_part_11_summary.pdfIn PDF document text
    • http://lebamojopa.pbworks.com/f/tc_bolt_tightening_method.pdfIn PDF document text
    • http://farejutotej.pbworks.com/f/sidorigasu.pdfIn PDF document text
    • http://juwelite.pbworks.com/w/file/fetch/144716643/kenonalubaziwajikibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dbf660e-9068-4694-b75b-4b5e9c7a9c57/fofiwufoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2fab8e-7d7b-4828-9c0a-592458143bc4/xuzodu.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_off0000e7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E2 5196 bytes
SHA-256: 66e0beb9eddf5574860fdb92805f72f07f4ada176c9cb02b8c8f30eb16cb2c87
font_01_sfnt_off0000f960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF960 10412 bytes
SHA-256: 7afd80dd09a1dc9cb35b2718fa21aef2b59532372273f52176e1a73673a3ea3d

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