Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aed703eaf643738…

MALICIOUS

PDF

76.1 KB Created: 2021-04-04 14:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a759d131c97974869e56ba833d7c5f09 SHA-1: d958da2fac5f08f00307de67eadcab2f9ba3c073 SHA-256: 5aed703eaf6437380bd3f8b7252346633130fec2eb3b57de063d6d0c07d8cf3e
134 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one that impersonates a 'BBC history magazine pdf' and points to a suspicious domain. Heuristics indicate it's a link farm on disposable hosting, and ML classifiers and ClamAV strongly flag it as malicious. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/award?keyword=bbc+history+magazine+pdf PDF link annotation
    • http://suberubepuparo.getenjoyment.net/48185397398.pdfIn PDF document text
    • https://cdn.sqhk.co/reteduze/h9aKdje/waxuvewiburedof.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/73387641485.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/hg2hg6e/80773229058.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/jmeUzAI/rounded_corner_rectangle_svg.pdfIn PDF document text
    • https://cdn.sqhk.co/ravunovibuxi/uSic8gj/kiruk.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwogoxozoxi/idjghc5/85268833360.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/bgchfJK/87711820895.pdfIn PDF document text
    • http://rozogididibusar.sportsontheweb.net/naruzej.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/ba78cfd9-e4c8-4496-8286-6aa045347d82/33213400129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea4a865a-29be-4a66-84d2-ad558825db70/how_is_dr_heidegger_experiment_a_romantic_story.pdfIn PDF document text
    • http://lidazadopedu.rf.gd/kawepor.pdfIn PDF document text
    • http://joxamemi.epizy.com/adventure_games_apk_uptodown.pdfIn PDF document text
    • http://vekemelegewimo.atwebpages.com/anomalous_secondary_growth_in_dracaena.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/3485397812.pdfIn PDF document text
    • http://lojarine.epizy.com/canon_rebel_t6_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/17744147147.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/58728974750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5657931-7d8b-40e1-a8d5-1b127db96330/pugunupijigituxepukesevo.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/kenipigomasadiwerikoxiz.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/death_of_the_author_lindsay_ellis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70b1a28a-c8a5-4181-b2b7-a593c46a0671/setokabugativedokoj.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_off0000e821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE821 5876 bytes
SHA-256: 3dd42e016a0c18f2bd637e45c3c9a71ad05d99cb67410e3d4c02cf75397f8091
font_01_sfnt_off0000fc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0A 11516 bytes
SHA-256: 5bf74196fa68b8dc160ff5d4a7bd34ebbf6b5a2aa589d0dc6e2eac4227571f82

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