Malicious PDF — malware analysis report

Static analysis result for SHA-256 003484d996b4a937…

MALICIOUS

PDF

74.3 KB Created: 2021-09-19 22:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c0f666e52d29fc28e0c754221f1c3249 SHA-1: 11eac456d32f5d9cec0da1e27dfad714abe7c280 SHA-256: 003484d996b4a937b33a3aab6cf3a3fa38b2dc930bfea213389b1fb7e3003d3e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically identified as a potential lure for 'moto bike game download apk'. The PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=moto+bike+game+download+apk PDF link annotation
    • https://unibel.pl/pliki/upload/file/12315652302.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/64746483750.pdfIn PDF document text
    • https://intekcanada.com/ckfinder/userfiles/files/11034703959.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/65511309825.pdfIn PDF document text
    • http://ifap.it/images/file/timebaderebuludefilerisel.pdfIn PDF document text
    • http://julianina.dk/upload/file/wukoni.pdfIn PDF document text
    • http://vinhthuan.asia/upload/files/40952197701.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/69584791289.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139cc8540eee---90046052702.pdfIn PDF document text
    • http://nujhimachal.in/img/uploads/files/sasabamewokesu.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210913154749161.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/62371946234.pdfIn PDF document text
    • https://centrorevisionimonregalese.it/file/75722953450.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/dikukilegosego.pdfIn PDF document text
    • http://amdind.com/userfiles/file/modekizebogufizak.pdfIn PDF document text
    • http://studiobonvino.com/userfiles/files/wizerarovegafimukuroguw.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/xukitodigibojon.pdfIn PDF document text
    • http://ranfeng.com/userfiles/file/2021-9///20219132137184266.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/rolemenewoliwulewijejo.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/28696547182.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/28536421084.pdfIn PDF document text
    • https://posh.hr/files/16426037452.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDBC 17436 bytes
SHA-256: dee5485026977561aafe87b83fdd01aff09a6a6f7ae6a0960284f7f29c193a78
font_01_sfnt_off0000eb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0C 10776 bytes
SHA-256: fe81c95e3060f43161f206caa0da34c760f90b235fd9c99547750cffbdf5e762
font_02_sfnt_off0001037e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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