Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac925dc7f2d0cdde…

MALICIOUS

PDF

78.0 KB Created: 2021-03-04 15:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: b9cf28ba1fefa1da426811c2ba1f02c3 SHA-1: 01488a70c5c7b631bdcf6cedb1a251e011e3c6e5 SHA-256: ac925dc7f2d0cdde4e9aa4e45c4d8e5fcbd19ba5d692cae17169a840e9a68358
156 Risk Score

Malware Insights

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

The PDF file contains multiple external links, with one prominent URL suggesting a lure related to a movie release date. The presence of PDF_SEO_LINK_FARM and PDF_URI heuristics, along with ClamAV detection as Pdf.Phishing.Trojan, strongly indicates a phishing or malicious redirection attempt. No scripts were extracted, but the document structure and embedded links are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://pelibifir.ru/award?keyword=love+story+movie+2020+release+date PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426944/normal_60212ec0397f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476924/normal_6028aab9a8380.pdfIn PDF document text
    • https://budozawepolok.weebly.com/uploads/1/3/4/8/134852557/01c22420989d3c0.pdfIn PDF document text
    • https://tavulejitozusol.weebly.com/uploads/1/3/0/8/130873759/6961493.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452624/normal_600125cf2820d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381751/normal_5ff71b05e9534.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5fe239495c2ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384036/normal_5ffcd443e5e10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_600d647d914b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c806ce6f-6557-444b-8ad1-816b4ac113b1/13565815320.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/amazon_animals_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd37343d-8177-4725-a40d-075c6002bad9/xeluvilugujezu.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/android_sdk_platform_28_not_accepted.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/54761276686.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/blackstar_id_core_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd23245-07ac-4f1d-9014-41e4dfec3510/fuwirunesakemimaxiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e613d1c-14f3-4762-807e-eda82d431c00/bijirovexodezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aed198c-dca7-48d1-b60f-1b1f4175a118/sony_mdr-rf985r_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/720c7ba1-3bed-4117-876a-68262c4e1f91/super_champ_x2_head_vs_combo.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/68066789051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b52c3526-9091-44b4-9d5a-af77f0c5b620/gibelonuwutafaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f27b908-808c-4e20-8007-d12248d09d15/adventures_of_sherlock_holmes_best_episodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bdb580e-fd68-4ba3-9dcd-0b9efe318557/10_day_green_smoothie_diet_shopping_list.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_off0000f55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55B 5348 bytes
SHA-256: f4c2663d8df2a847d178e05a9f0155b1d03110b7f0d66b854fbe7331f6f74efc
font_01_sfnt_off0001077b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077B 10320 bytes
SHA-256: daf30ff80bcd70c79eedf332efe808c7647ad90000e1410a211803aef8a60e50

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