Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14af82b8ec1e2a2…

MALICIOUS

PDF

85.9 KB Created: 2021-05-27 11:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ce188a1a9701082564f6801200763b6b SHA-1: db5f28ebbd392f2a77fc86dbae0612bddf41d871 SHA-256: d14af82b8ec1e2a2702fe0568c332e1f2b6522b4d70702783ba2d256e8f3e2ac
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and point to known malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm designed to distribute content, likely for phishing or malware. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=transcendental+meditation+guide+pdf In PDF document text
    • https://xuvamedinomu.weebly.com/uploads/1/3/5/3/135392700/bemofo.pdfIn PDF document text
    • https://jirijovan.weebly.com/uploads/1/3/4/8/134885562/3597988.pdfIn PDF document text
    • https://fevolasoboz.weebly.com/uploads/1/3/7/5/137514380/pedes.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/jenataxewob.pdfIn PDF document text
    • https://dapobatajixafaw.weebly.com/uploads/1/3/4/3/134310280/jokuza-fiwazekataso-xepof-getuna.pdfIn PDF document text
    • https://logomuwijo.weebly.com/uploads/1/3/0/7/130738525/pagopidobevamexiva.pdfIn PDF document text
    • https://wuwawumakilur.weebly.com/uploads/1/3/4/8/134875279/7172406.pdfIn PDF document text
    • https://wimixexaselu.weebly.com/uploads/1/3/4/3/134324609/c9b2ab4e20f056c.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/2d746845-e46f-4aad-a15c-bb2ec60d3a0b/59856201912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2ded470-aaaa-4249-a921-ca30140e8f7e/schaums_outline_of_discrete_mathematics_third_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e1dcfb-16fd-43fd-9860-e8c19732802c/finnegans_wake_ita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3da6a38-dfa9-4d73-9442-4bd075196679/timovad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3d705ed-fa2a-4cc9-88f4-69c6ccf9fa57/how_do_you_know_if_a_power_bank_is_fully_charged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89395373-f7fc-407a-b7c4-baf6ae87148d/41654285412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8eee8ca-d33a-488d-baef-c00fbf6ca038/how_to_do_istikhara_shiachat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde65d08-0b4e-4179-b009-64d00bf21580/can_headphones_be_repaired.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5e6e044-832f-4306-bbf7-d765cb4fbb3a/bifekusonujanisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbb3540b-8515-4a5a-a21d-10d67b8fa648/craftsman_lt1000_price_new.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea83896b-2770-46eb-b1e6-1d730e5b5011/52968957654.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC76 5424 bytes
SHA-256: 7e78c9e55b768c75e4b57ddb7052a9ff322c8e317e5872c221e3903380104e43
font_01_sfnt_off00010ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED0 11004 bytes
SHA-256: c5ea253d815e73bc749f225d56b046de9b8b5a0a8223bb51f4b45bde00d648ad
font_02_sfnt_off0001346b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346B 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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