Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b42ff75e981e94…

MALICIOUS

PDF

72.5 KB Created: 2021-06-12 17:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3f03a60cc9f2331ae918d033a574e096 SHA-1: 04bd641937b60427ed437b34c278aa70c3f67455 SHA-256: d2b42ff75e981e940c447f482facbe4117f4ef561785766fc75040a02f10e2d1
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with one prominent URL being https://laborke.ru/pbw?utm_term=pinoy+movies+online+free+watch. The heuristic PDF_SEO_LINK_FARM suggests the PDF is designed to create a large number of external links, potentially for SEO manipulation or to distribute malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://laborke.ru/pbw?utm_term=pinoy+movies+online+free+watch PDF link annotation
    • https://bivamotitujodo.weebly.com/uploads/1/3/4/7/134712473/a16fb893e08.pdfIn PDF document text
    • https://sunisilasofuz.weebly.com/uploads/1/3/7/5/137517989/womosixewom.pdfIn PDF document text
    • https://lopuwawafebe.weebly.com/uploads/1/3/5/3/135341409/beguwujin-jubonaleli-tegukegepesiluz.pdfIn PDF document text
    • https://vezitiratad.weebly.com/uploads/1/3/1/8/131856143/pinofanelidazevi.pdfIn PDF document text
    • https://guxevelanitab.weebly.com/uploads/1/3/4/7/134769418/zuzesuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a10283-9b57-498e-8a12-f9a5150de985/ginineputudeloruwip.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/f/19497817230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c440d8b4-7264-48e4-b03f-0a0d963f30dd/53603310374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef5a1284-80c9-4ff1-806b-198e5a073506/saaho_full_movie_download_filmywap_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f649e2a-1a4a-47c2-b98a-2da1ecb9d2d8/harry_potter_book_6_chapter_summary.pdfIn PDF document text
    • http://foziwedugumu.pbworks.com/w/file/fetch/144623724/82409875630.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/f/lorosixevijemezuruduwa.pdfIn PDF document text
    • http://fagimox.pbworks.com/w/file/fetch/144519597/how_to_set_defiant_door_lock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa732171-8dfc-440c-b78e-d5e2ef471a18/how_far_apart_should_floor_joists_be_on_a_deck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1ecb57-603e-4cc1-91ea-ee3da565f92a/53065635093.pdfIn PDF document text
    • http://faxamom.pbworks.com/w/file/fetch/145024167/cydia_clash_of_clans.pdfIn PDF document text
    • http://didaneguk.pbworks.com/w/file/fetch/144741003/diniregijoledebenivasuk.pdfIn PDF document text
    • http://lesokulovisu.pbworks.com/w/file/fetch/145103709/free_download_wedding_anniversary_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bae1dc9-ba51-47af-b6ba-db6a75b2dac5/tagenavafeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b5219b-62df-4c7b-99b7-a5b89f633aaa/16354290330.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/w/file/fetch/144450150/domavosujosonunomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e23899e-e213-4a6f-b845-7bb5430fda37/fotodobisogedekosokobot.pdfIn PDF document text
    • http://degenazi.pbworks.com/w/file/fetch/145168350/best_health_potions_skyrim.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/encyclopedia_judaica_vol_21.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_off0000df2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2F 5376 bytes
SHA-256: a0537851fc66520c003175edeac099c308e6666551959a8b50a101884e4f082c
font_01_sfnt_off0000f16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16A 10432 bytes
SHA-256: 58c9f067ac88e94536a87391dbd994eb683b71579a675ab16753ba1110a61590