Malicious PDF — malware analysis report

Static analysis result for SHA-256 de3b1af60dc7d56f…

MALICIOUS

PDF

65.1 KB Created: 2020-12-18 08:34:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e528ea765364045883e41c89cecbec6f SHA-1: 23317a245d854ff5b17d94c8d0a27436dc71121b SHA-256: de3b1af60dc7d56fb8e6fcb203338060088c0810384f1defb1bde75721237bc1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics and ClamAV, indicating it is a phishing or trojan delivery mechanism. It contains a large number of external links, suggesting a link farm or redirection strategy to obscure the final malicious destination. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's purpose is to drive traffic to malicious sites.

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://traffking.ru/strik?utm_term=navy+brag+sheet+template PDF link annotation
    • https://xisofapetuv.weebly.com/uploads/1/3/4/7/134747578/nuwemerez_sumenasutomuto_fewukopuvife.pdfIn PDF document text
    • https://roxagidu.weebly.com/uploads/1/3/4/7/134748987/xidorew.pdfIn PDF document text
    • https://wawukonuxoni.weebly.com/uploads/1/3/4/0/134095992/kanedude_vubetawa_bovotutipiwon_mexugasifeg.pdfIn PDF document text
    • https://sawebegiwe.weebly.com/uploads/1/3/4/7/134706463/9769522.pdfIn PDF document text
    • https://kanexala.weebly.com/uploads/1/3/4/3/134374151/luzipaxiwosatosovepi.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/fixararololu/zekefizakobojowawujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31bf7cd-1bed-4e6a-9865-ab0aff9b28d1/craig_bluetooth_speaker_dollar_general.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5cb9f80-84d0-48ff-811e-5a6766992fb5/673287625.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/lupoxiba.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/admiral_byrd_middle_school_winchester.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c857e11-e120-4326-9df1-c7ebfd8191de/9943935020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff09c9f7-aace-46f8-bef8-b567f93ef511/monelotuwisebevubipalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aaae2fc-edc0-4e39-b0d8-564f0334d37a/peniwajeji.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_off0000c1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1EC 5504 bytes
SHA-256: 3fd124bb8910ab07823421145bde597341643a21102b1d7d89b065261a5a916f
font_01_sfnt_off0000d48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48D 10432 bytes
SHA-256: 83d12db278ea1cbade9b57a18ae44a2a9a7e45ca2936a1fa98bab1b23ff48e2e

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