Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a5183a9c8f88be…

MALICIOUS

PDF

65.8 KB Created: 2021-01-06 06:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b72b90f1949512b43751b26264d66c8a SHA-1: 3ee7f379b98dc316111704fb7c28c671532c03d7 SHA-256: 76a5183a9c8f88be85756e3e635d6b0814e07c5b05c3cc23b439a934d62748e0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to direct users to malicious sites. The primary URL identified, 'https://traffnew.ru/aws?utm_term=awake+movie+subtitles', suggests a phishing or scam attempt related to movie subtitles. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://traffnew.ru/aws?utm_term=awake+movie+subtitles PDF link annotation
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/pufifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_5f8d69571aa04.pdfIn PDF document text
    • https://lonunibulitog.weebly.com/uploads/1/3/4/4/134498578/f72eeac9dfa04.pdfIn PDF document text
    • https://mejefarekobuk.weebly.com/uploads/1/3/4/3/134338461/5688454.pdfIn PDF document text
    • https://bawapumur.weebly.com/uploads/1/3/4/4/134466187/madujuki-xumuras-zasorudewuwobov.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/56b27c954576.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/5f38167b-d881-4339-bc16-fe09e2e466d7/pokemon_macho_brace_super_training.pdfIn PDF document text
    • https://s3.amazonaws.com/nepawigexa/kindle_fire_owners_manual_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d012ecf4-1801-43ff-b6c4-ae23064021f3/24311435291.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/limakidinazifes.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/csep_exercise_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/lithium_battery_label_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/martin_puccio_today.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_off0000c507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC507 5080 bytes
SHA-256: fcba0fe70b3f1703fbc2d42cc2667f4fa1d13ffef2e99d08ae55ea299bff026f
font_01_sfnt_off0000d658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD658 10636 bytes
SHA-256: 43afe07e19b5436b174e93f42b59f53df7c79dce03309d3134410a1823fae813

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