Malicious PDF — malware analysis report

Static analysis result for SHA-256 52c1c618264edd52…

MALICIOUS

PDF

68.4 KB Created: 2021-03-12 20:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4a0a87f617f01a2789c2234e7a84f48b SHA-1: 16913850ae7cc27d51b87171559037fbd56967db SHA-256: 52c1c618264edd52ee9b507ac3c43da7d50f5077fb5da123941b1b1f5ba8b13e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of ML_NYX_PDF_MALICIOUS and ClamAV detections further supports its malicious nature. While no scripts were explicitly extracted, the PDF structure and numerous URLs indicate an attempt to redirect users to malicious sites, 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/aws?utm_term=tableau+desktop+activation+key+free PDF link annotation
    • https://cdn.sqhk.co/nigulavax/hjeyl7P/need_for_speed_no_limits_apk_data_adreno.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/ijfhehe/dexakipoput.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419235/normal_604b6fa9381a2.pdfIn PDF document text
    • https://temisufe.weebly.com/uploads/1/3/5/3/135384001/9688117.pdfIn PDF document text
    • http://pl50off.info/rayovac_battery_charger_blinking_bluy3ni8.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/jachegg/72892395337.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390996/normal_5ffdba24419dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444123/normal_5fce6072b1cf3.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/8iiviez/red_ball_rush.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490754/normal_5fd9e517da0b5.pdfIn PDF document text
    • http://wejnpowk.space/vibonuxumowulemokujewapon6j1rd.pdfIn PDF document text
    • https://cdn.sqhk.co/waxoxewanuvi/iiEih9p/driving_school_2017_free_money.pdfIn PDF document text
    • https://cdn.sqhk.co/liminekaj/vujebLc/pakilikonunuzukeso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472783/normal_6043e086ee690.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/bRhaJja/prey_day_survive_the_zombie_apocalypse.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/NoihA5N/gmod_best_prop_hunt_gamemode.pdfIn PDF document text
    • https://cdn.sqhk.co/zetobazox/8giRidM/dream_meaning_blue_bottle_flies.pdfIn PDF document text
    • https://gewewipuno.weebly.com/uploads/1/3/0/7/130775766/zeripitole.pdfIn PDF document text
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/3956742.pdfIn PDF document text
    • http://mon-cmbretagne.com/modelo_acta_de_constitucion_de_proyectoqitmi.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/zQRwjhx/ocoee_river_whitewater_rafting_deaths.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/1h7zgj5/86977614408.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ce0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0D 5464 bytes
SHA-256: 50b2ec438abc4dc3e769911312ffee1beef3996fcba090704cf6b4fa3b328e20
font_01_sfnt_off0000e0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B9 10708 bytes
SHA-256: 843857dbbc77507f6dacc1e2a1b1c1002b0263db723fca24dd5a6ad8e53c004f

Open this report in the interactive analyzer, or submit your own file for analysis.