Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb0bfc439afc21a…

MALICIOUS

PDF

77.9 KB Created: 2021-04-09 18:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0f6d0ae1ffd52c6e509b5c3f70e7cb3d SHA-1: 72474fa0d12e01e8972ea831f9f3ef43f6e80fee SHA-256: 1fb0bfc439afc21a61d36c5167386792479402b44fa5198ee4c4254db8b73da4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/strik?utm_term=did+ruger+discontinue+the+lc9s PDF link annotation
    • http://retys.space/113826625130i05m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480591/normal_602424e23861b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377381/normal_60080352a24b8.pdfIn PDF document text
    • https://bosuzegenelulu.weebly.com/uploads/1/3/4/1/134131522/f5aa25.pdfIn PDF document text
    • http://yatvoyya.fun/information_retrieval_system_capabilitiesk29xx.pdfIn PDF document text
    • https://xaburopufazig.weebly.com/uploads/1/3/6/0/136051881/zoboboge-voboxewilameza.pdfIn PDF document text
    • https://nunezexivu.weebly.com/uploads/1/3/4/4/134440215/gupiz.pdfIn PDF document text
    • https://zofafekolabu.weebly.com/uploads/1/3/5/3/135301669/055007b.pdfIn PDF document text
    • https://mapilezije.weebly.com/uploads/1/3/5/3/135322213/6804296.pdfIn PDF document text
    • http://reduslim-siteofficial.site/zowoxumadonudukov10.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/fupanabivote/45050824132.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/25644228958.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/doctors_note_for_work_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/voneruwadedizikiso.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/red_alert_4.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/chammak_challo_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/fesakoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/jixodudumavuzupi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F5 5148 bytes
SHA-256: 0f17d725f399eba18f8b7ca2b7d2a62c25b67ca49d74c519f4d394a362cdf34e
font_01_sfnt_off0001047b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047B 11116 bytes
SHA-256: 2653bad55cc943e18b66e004232165c6366fb94b022bbc12050d9031c7fe9337

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