Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc64cc63c8da503c…

MALICIOUS

PDF

81.9 KB Created: 2021-04-04 18:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0d7acb52f861d438da23f29cf8e2c8b3 SHA-1: 91c674c854bd24f114cc011834d6e36260cc1ea6 SHA-256: fc64cc63c8da503cddde3a7c98b7bb397680bd72c59c85f789bd280b0660d2b7
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 0.9996

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://jumiwimov.ru/wix?keyword=chapter+12+biology+reading+guide+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453730/normal_5ff9eb1a927c3.pdfIn PDF document text
    • http://parrrtner.xyz/datupupigyztq6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384145/normal_5fd9722ba399b.pdfIn PDF document text
    • https://miwejezapelo.weebly.com/uploads/1/3/4/3/134342363/nizebiposamu-sifuxux.pdfIn PDF document text
    • https://ruwatavefi.weebly.com/uploads/1/3/4/7/134704280/3326871.pdfIn PDF document text
    • http://cabinetsop.xyz/death_of_ivan_ilyich_analysis8xfjk.pdfIn PDF document text
    • http://bivitajuteje.mypressonline.com/what_is_the_best_ric_hearing_aid.pdfIn PDF document text
    • https://vegirizixe.weebly.com/uploads/1/3/4/7/134716682/890dee739c111.pdfIn PDF document text
    • http://swiss-family.space/55206809927tod9z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468530/normal_6062125f88a11.pdfIn PDF document text
    • http://damvglaz6.xyz/vekawomoketevufuwugivlt79t.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/autodesk_simulation_cfd_tutorialimb29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_6052b11198a1a.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/amiodarona_e_hipotiroidismo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422385/normal_5ff65838ce737.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/b0544f2d-1b55-4b94-8be4-7a5621a0c1e4/rexujugebopakejepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd70f6c7-e1a5-4109-8a6a-e4ce7b30e556/25179261037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5c2292-4109-4a78-9d7c-3b9490aa9961/bazevisesewitononuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1bbda35-cbfb-4f9c-84c3-76800f088c5f/55934188196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/388a70e4-f570-4520-a6eb-81a59252840c/e2_hitch_round_bar_install.pdfIn PDF document text
    • http://muluwokixo.onlinewebshop.net/xujojixagesofimodoburuleb.pdfIn PDF document text
    • http://jiwodiw.myartsonline.com/mapokapolafewipubixa.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_off0001011e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011E 5644 bytes
SHA-256: fc6af1d9b9f21720d90bb3c1b97fbfc34cbe107bb2cc56e7d8940bd5bf692f80
font_01_sfnt_off00011457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11457 10984 bytes
SHA-256: 84ff17159d9021e91ba240590125a4e05eabe4a02b953b8ce1188780c3504f62

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