Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dadd36708752701…

MALICIOUS

PDF

80.8 KB Created: 2021-02-28 07:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f6a73e118a46d4a28c1c6ae502fea587 SHA-1: ae4df3310df48888651f5d418af28a843479e4cf SHA-256: 4dadd367087527011b17355cb866581f021d16561a35437760772cef1a37b1e4
156 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains a large number of external links, suggesting a link farm or distribution mechanism. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the PDF heuristics point towards a malicious intent, likely related to phishing or SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://druttle.ru/123?utm_term=2005+peterbilt+379+service+manual PDF link annotation
    • http://wejuzofibab.medianewsonline.com/nabazozagob.pdfIn PDF document text
    • http://50offstore.info/sedona_method_emotion_chartvrkd6.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/kurorusuzapoz.pdfIn PDF document text
    • https://puwikemumej.weebly.com/uploads/1/3/1/4/131454306/ligikowuji.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/falanutozamavusibosevole.pdfIn PDF document text
    • https://benipotuwazel.weebly.com/uploads/1/3/4/4/134445242/4169437.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/zivifivabina.pdfIn PDF document text
    • http://rebelliona.online/hp_5520_printer_black_ink_not_workinggvfkx.pdfIn PDF document text
    • https://julupovopanar.weebly.com/uploads/1/3/4/7/134732987/5583521.pdfIn PDF document text
    • https://sugodaxekot.weebly.com/uploads/1/3/1/8/131872070/1458510.pdfIn PDF document text
    • https://cdn.sqhk.co/rebiguta/hgigjfm/16600702095.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xufoxorog/broadsheet_perth_new_restaurants.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/balance_sheet_format_as_per_companies_act.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/80068886628.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/rusegi.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/28322781904.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5E 5756 bytes
SHA-256: 8a7ea00dcc8d20544192188124dea2ca58ecca6825c98bd047a257fe16ab8d71
font_01_sfnt_off000100ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CE 11772 bytes
SHA-256: fc4545facf0736c242cedf236c13e224c23032f090f4e755ad47cbf0d8e820a7
font_02_sfnt_off000127a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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