Malicious PDF — malware analysis report

Static analysis result for SHA-256 7560de94635ab7df…

MALICIOUS

PDF

75.6 KB Created: 2021-04-05 00:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c9f8ca88b85f26350e78b4adf0980032 SHA-1: 9f6a5c1498ad2f1e01b0ecadbe5819c307cc6386 SHA-256: 7560de94635ab7df38d6f7673dc49085827c3cc381661957e670c48f2a7b77cb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://bologen.ru/strik?utm_term=what+should+i+name+my+dog+buzzfeed PDF link annotation
    • http://lnstagram-copyright-supports.com/vidasurulamimewipezowek33eq.pdfIn PDF document text
    • http://salonhq.xyz/cisco_dpc3825_modem_username_and_passwordqngk8.pdfIn PDF document text
    • http://keep-travel.com/bipalephfkpv.pdfIn PDF document text
    • http://latomixoxa.iblogger.org/81186153502.pdfIn PDF document text
    • http://pokuwasu.iblogger.org/67929151118.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/nedemagasadejep7h4.pdfIn PDF document text
    • http://euroshopmn.space/drive_by_download_exampleqwhhn.pdfIn PDF document text
    • http://leravuviwipolox.iblogger.org/35164688290.pdfIn PDF document text
    • http://manamuketamas.22web.org/ligipafupuvugixagogo.pdfIn PDF document text
    • http://opensol.xyz/adverse_events_following_immunization_formzsr43.pdfIn PDF document text
    • http://websporizle3.com/samsung_smart_switch_mobile_ios_downloadac5fr.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/c7fddae7-e1d7-42d9-b753-d062229f1b2d/13722978886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880c9b76-81d0-45e6-858c-e21697c0fae9/toyota_yaris_2007_for_sale_olx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa4a18a-ba47-4941-8d14-0a747a0f6a8b/what_are_brain_teasers_good_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f08f4771-211c-4660-b000-166c68c5f477/iceberg_slim_pimp_glossary.pdfIn PDF document text
    • http://pamiwumewamem.epizy.com/the_boarded_window_discussion_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd8ae4f-7e86-4520-8221-bbdb41fd5310/jujabupilijixizafet.pdfIn PDF document text
    • http://fivomasabod.rf.gd/the_octoroon_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d56f19-0109-4ccf-9aa0-cbdb6557b8fb/53623043860.pdfIn PDF document text
    • http://pikididubemet.epizy.com/sermon_outline_on_church_thanksgiving.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_off0000e85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85E 5528 bytes
SHA-256: 997593d4e96ba70a34c35df0dfc4c9a52b161cd943ed85f7c5f8b887327cbcda
font_01_sfnt_off0000fb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB23 10716 bytes
SHA-256: e306b79296775f6fe8a006bf5bb8cfd2a75ad130e9d6b51f3a9addca12912871

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