Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1b1c78e82e9f05…

MALICIOUS

PDF

73.3 KB Created: 2020-11-16 14:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 88a4f30a2b6ec2683a3834ac0abf865d SHA-1: bf937d1b08b375980065f4749e0546bbe54d2663 SHA-256: 3d1b1c78e82e9f059ca78ed5ffc879726a5be15116bdb082cfd98c35738ddc19
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One prominent URL, 'https://trafftec.ru/123?utm_term=this+boy%2527s+life+pdf+download', suggests a lure for downloading a PDF, likely to distribute malware or phish for credentials. ClamAV detection as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/123?utm_term=this+boy%2527s+life+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448347/normal_5fada187db81b.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/9639692.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/4144282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5f938e124accb.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/5341355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f876487db1c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5f8ad3ee04b3f.pdfIn PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/domusuket-remixo-xusijag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zesotat/aptitude_test_questions_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/201f48fb-a28d-4dc5-89e2-1f6fb50f75cf/p4g_shu_social_link.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8653e39-7dc8-4097-8608-6b32ecaa61d4/vatotiwatojelafofifune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c98839-a617-472d-b99d-5c41768be102/gotegamatov.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/37249056001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b36d7c7-dcc5-4786-9ff7-048892aa2026/firitarapabiresijoporas.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1B 5060 bytes
SHA-256: e4b150da37a5d0c008f0a07c9dd48c8293fe677cf6a8c39ac666949786695a52
font_01_sfnt_off0000ce52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE52 10660 bytes
SHA-256: 252f06c9a89d6f7bd2298deebbb93c1392bdf141ce0d4dfcce552059eac9244b
font_02_sfnt_off0000f2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 16192 bytes
SHA-256: b80dcff4b26782ff2bd1ed82e01ce9053ba91b1a5afb9bea673378648d26bec5
font_03_sfnt_off0001080f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.