Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d7b5ab7b6088b8…

MALICIOUS

PDF

70.7 KB Created: 2021-03-08 08:51:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0c2fb5ea0c381882fc2f6e1110324ab6 SHA-1: a1e2774f4179e93771ce74588c12de42acd1d686 SHA-256: 07d7b5ab7b6088b81472420130d66c6ee31afb0a358cf97b58945de6334a59d0
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF is flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The presence of a 'download button' lure further supports a phishing or social engineering attack. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/strik?utm_term=how+to+crochet+a+rectangle+granny+square+afghan PDF link annotation
    • https://fadefufogu.weebly.com/uploads/1/3/5/9/135960472/a957f2e877.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416921/normal_5fd9001ec364a.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/ccYfq1u/26154671977.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/FwHibxA/analisis_foda_starbucks.pdfIn PDF document text
    • https://cdn.sqhk.co/libidexa/Vboe5OD/green_bubble_fremont.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/Ogfiizr/color_worksheets_for_preschool_and_kindergarten.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/67708879657.pdfIn PDF document text
    • https://cdn.sqhk.co/lafixafif/cgigjhb/idle_stickman_mod.pdfIn PDF document text
    • https://mapimodedafibo.weebly.com/uploads/1/3/4/7/134708703/6ae40c.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/gre_test_at_home_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/ludukuni/agclZii/fighting_tiger_liberal_free_download.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/47788840583.pdfIn PDF document text
    • https://cdn.sqhk.co/mozigizax/HggMhdy/navepit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_602448c26b234.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/networking_all-in-one_desk_reference_for_dummies_download.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/3909f4e5-dc24-4a72-9d7d-52a0dab708f6/110cc_engine_oil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e1ab91-c37b-495c-94c6-a9c66898ca28/what_is_hue_saturation_brightness.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_off0000d677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD677 5424 bytes
SHA-256: 56ec0a06815b0b48251d80a6364fd60b14be085b8f2eac7959853f0b00386ce6
font_01_sfnt_off0000e8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FD 10696 bytes
SHA-256: 2ca2aabdb3d9eb7eb8d51af0b9db988da491b563e3b03212539ab182d75f2c4f

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