Malicious PDF — malware analysis report

Static analysis result for SHA-256 d275d9061f319f77…

MALICIOUS

PDF

72.5 KB Created: 2021-03-20 01:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 161d234f743a571f4becc3ee605d28c8 SHA-1: 5f54fdcbf502e9d466682d9903c8bcaee56df0e4 SHA-256: d275d9061f319f77685880ae3e5141a67cc94f6c06bd974eb8a07e7e7fe52de9
134 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier strongly suggest this is a phishing or trojan delivery mechanism. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious workflow designed to trick users into downloading further payloads or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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://lozipotod.ru/award?keyword=makkar+ielts+academic+reading+book+pdf PDF link annotation
    • https://xapebetilozeze.weebly.com/uploads/1/3/0/8/130873864/kekifumap_sowar_pezokor_tijukura.pdfIn PDF document text
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/sazonar-pazulitidirijuk-fewofiti-geravuziveja.pdfIn PDF document text
    • https://pizipeko.weebly.com/uploads/1/3/4/6/134611096/6371298.pdfIn PDF document text
    • https://rovagurepuj.weebly.com/uploads/1/3/1/8/131856033/gabekitevasuvuw_kizeladuneveba_nimetadobim_doropamonur.pdfIn PDF document text
    • https://cdn.sqhk.co/talokelom/bia62O1/hang_glider_motorised.pdfIn PDF document text
    • https://cdn.sqhk.co/puvijupem/cheqYNe/homeschooling_in_panama.pdfIn PDF document text
    • https://cdn.sqhk.co/jotoselu/b9ZdhaI/clicker_heroes_codes_2020_october.pdfIn PDF document text
    • https://sakurulemiba.weebly.com/uploads/1/3/0/9/130969926/kefupodabanadato.pdfIn PDF document text
    • https://numuteje.weebly.com/uploads/1/3/4/6/134683694/nakeletipowu.pdfIn PDF document text
    • https://cdn.sqhk.co/kibizatududo/ggZgfP9/lilosafobenuwaturew.pdfIn PDF document text
    • http://juvasojiwal.66ghz.com/how_to_perform_istikhara_prayer_step_by_step.pdfIn PDF document text
    • https://kuvitarige.weebly.com/uploads/1/3/4/0/134095916/9900986.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/5506526.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/ajejfji/76890890741.pdfIn PDF document text
    • https://gitosupogule.weebly.com/uploads/1/3/2/7/132741155/nevamoliminajo.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/ad4d34f0-19eb-4521-b708-ed7b39b7d454/58965443668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/568a21e4-d1f9-42ca-b87e-5c3d06a6a500/58430139989.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/ipad_mini_2019_case_argos.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/reservation_cancellation_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/54234903028.pdfIn PDF document text
    • http://nawevepumag.rf.gd/magoviwolivofudanabofed.pdfIn PDF document text
    • http://ninovaxabax.epizy.com/60904792904.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_off0000dcc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC7 5684 bytes
SHA-256: 1ccb22212a9c37e76c7fbe2d931e0ab34ba1a60cd716989adeb6951072efe7e6
font_01_sfnt_off0000f014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF014 10508 bytes
SHA-256: 959ddbeb4a16071bdff0f4b9788caf23f4d226f50ab9c100a2a3e13cd36b222b