Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e190c626502f27…

MALICIOUS

PDF

69.1 KB Created: 2020-11-16 16:25:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a30160f1650175c7af9c4811fe3e3e0b SHA-1: 1182025f4e5fe9f99bda3b7ec86d078912d553de SHA-256: 40e190c626502f27c0d6744cda0e1a6561a1b786824b6106d1191f5c845d67d1
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for SEO poisoning or phishing campaigns. The presence of a link farm heuristic and the ML classifier's high confidence score indicate malicious intent. The embedded URLs suggest the document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=bloons+pop+5+unblocked PDF link annotation
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/e89fd39b.pdfIn PDF document text
    • https://viwosexoteb.weebly.com/uploads/1/3/4/6/134631328/juvek_folagiv_zasugivotopiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5fa045879f03c.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/pefexapis_wosag_zitix_pelefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_5fa0c98753271.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/1d5ecf1d-7a67-476c-9d4e-585d4d2c9367/moruniwetuzepe.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/81153359335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef84895-837c-4b51-9b1b-c750445574bf/ranuk.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/not_so_berry_challenge_sims_4_cc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db28024b-11e5-44d5-b25b-552fd2281286/the_batman_who_laughs_download_tpb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f8871f9-91be-421d-af5c-0f387221e578/everydollar_login_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/5245030518.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/david_rice_md_upmc.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/discuss_duchess_of_malfi_as_a_revenge_tragedy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77e1baa-68f0-428f-ac9f-9afb9f0189e5/past_perfect_simple_past_exercises_english_hilfen.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/womalopokidawesirete.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_off0000d091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD091 5140 bytes
SHA-256: 730ce68ebb77ee216dc28f714280b566a756aa851eaff9abdaba94ca8627f599
font_01_sfnt_off0000e229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE229 11060 bytes
SHA-256: a781c7592bdf26edc96dabe534941690ba278a6a7cd01f4653751d1cc3e7c62c

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