Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd7cc8e2d42984f…

MALICIOUS

PDF

80.3 KB Created: 2021-03-09 06:45:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7b0076e4dc460d04380f33487553a6f3 SHA-1: 51d6d73e0ca8be4bae69e1d757db34e033e5f167 SHA-256: fcd7cc8e2d42984fff169a68500a8476cd8283f234a9a8f918d5fc6104904918
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 0.9993

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://xajibur.ru/strik?utm_term=aquasource+handheld+shower+head+parts PDF link annotation
    • https://cdn.sqhk.co/xadakede/iyMhhwM/vunenezu.pdfIn PDF document text
    • https://cdn.sqhk.co/zelosoza/eJggLhd/usa_button_machine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461232/normal_603c0a2caef48.pdfIn PDF document text
    • http://rent-nout.site/what_are_considered_hazards_in_the_workplacetazyz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_600fcec899597.pdfIn PDF document text
    • https://nilazarokidimud.weebly.com/uploads/1/3/4/4/134495838/5658625.pdfIn PDF document text
    • http://fbcopyright-center.com/stumbling_on_happiness_critical_reviewj1j2i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408879/normal_6016acca03425.pdfIn PDF document text
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/vazas-nikazefasimopob.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/hhTAibK/90570708387.pdfIn PDF document text
    • https://mufamemibota.weebly.com/uploads/1/3/1/8/131856380/paravujelagumok_rizazawo_tobujaxeximiluk.pdfIn PDF document text
    • https://wirujiko.weebly.com/uploads/1/3/4/9/134900452/garejatugisixa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446286/normal_6001bc6864e33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_602aafca8a140.pdfIn PDF document text
    • http://ttop-shop.com/melafurodavopunazaephy2.pdfIn PDF document text
    • http://gtomishebs.xyz/lorinafowoxixenekejbm96z.pdfIn PDF document text
    • https://veguxalefimas.weebly.com/uploads/1/3/1/3/131382166/xutub.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/6a91ec64-d2b6-44d3-8a3b-5d2a377b3c30/benofiwuxusonimurikuzo.pdfIn PDF document text
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_806c0cf398714c88bfe0ecd7db0d1ed3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fcb4133-3523-4c73-b583-96fb396bc8ff/82985767640.pdfIn PDF document text
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_fd3edc18b58c4a90bd94398d368901cd.pdf?index=trueIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_5eb033a0b45e47adba52e888ebe6e570.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cea39c5-b291-42b0-af08-b8b880a41ed5/leroli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ac93c0-3bd0-43b8-abe5-9d362768c419/27270679323.pdfIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_6caf9e2559274bac988eb706438a193f.pdf?index=trueIn 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_off0000fdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAE 5368 bytes
SHA-256: ff53e705c44ceeeaa6f1e627d8ce0bb3a0b8e6da702e02390d11b7013262f78d
font_01_sfnt_off00010ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF8 10436 bytes
SHA-256: cfceb3e93be9f1e7c66464ab73fe8c5401009bdb40ed460ccb363fc2dd7b3dd1

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