Malicious PDF — malware analysis report

Static analysis result for SHA-256 102cd1b9a02cd3a5…

MALICIOUS

PDF

76.7 KB Created: 2021-03-23 21:15:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 660d8d605c26bdd47d7e155c45f7ab82 SHA-1: f6f82dfd2b560c7c59a1ea30102bd91fe9b9c727 SHA-256: 102cd1b9a02cd3a5777351a636b8b414ec7f7d46c3e00e3d0b373cf8cae560a1
134 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The document's structure and numerous embedded URIs suggest it functions as a link farm, likely designed to redirect users to phishing sites or download further malware. The presence of urgency lures in the document body further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/wix?keyword=lego+monster+minifigures+lot PDF link annotation
    • http://lobulezinovux.medianewsonline.com/how_to_cook_ribs_in_slow_cooker_from_frozen.pdfIn PDF document text
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/5145638.pdfIn PDF document text
    • https://dopotalufiru.weebly.com/uploads/1/3/4/6/134601398/221462c.pdfIn PDF document text
    • http://gejurabek.getenjoyment.net/68787934011.pdfIn PDF document text
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/999041.pdfIn PDF document text
    • http://posurazatux.mypressonline.com/dudulojibajafuzuwebubap.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/the_dolls_house_by_katherine_mansfield_critical_analysis.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/the_mask_of_the_red_death_audio.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/what_is_the_best_book_to_learn_linux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477651/normal_5ff7e320087b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_60239dbfccb5a.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/nimaj-likinalezono.pdfIn PDF document text
    • http://zujuzerawijuk.medianewsonline.com/how_to_train_your_dragon_show_order.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/xirebil.pdfIn PDF document text
    • http://tujufevowupise.epizy.com/average_grade_point_average_australia.pdfIn PDF document text
    • http://vobununebufipu.rf.gd/latoxesepumolisigur.pdfIn PDF document text
    • http://tasaroje.epizy.com/xakuweti.pdfIn PDF document text
    • http://manatezolixoguz.epizy.com/arduino_midi_library.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/9241493559.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/regulatory_reporting_job_duties.pdfIn PDF document text
    • http://genufewewirim.rf.gd/vpn_client_apps_android.pdfIn PDF document text
    • http://vekemelegewimo.atwebpages.com/75862923542.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/322299695.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/whats_a_synonym_for_employee.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_off0000f156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF156 4820 bytes
SHA-256: e09eab2a3bc646a56d0d0aa99a33e3bed63ab805c86d111f93d012e24da56ca1
font_01_sfnt_off000101b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B1 10444 bytes
SHA-256: d75f9581357dd74586ade98e15d100aad3f7a9c87878bfebec3e451c4afaba79

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