Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e8f972f131fe445…

MALICIOUS

PDF

63.9 KB Created: 2020-12-20 13:05:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 666e4b5ac839ae071e016df0738440f0 SHA-1: eaf29427b655271269471e74cb1aa50bd8be8178 SHA-256: 3e8f972f131fe445f0a867b293b9fce92beb3c88f87ed3c8fd84a89c424e6f7a
214 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, 'traffine.ru', which is disguised as a download for 'where's my water apk'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly indicate malicious intent. The presence of a large number of external links, as flagged by 'PDF_SEO_LINK_FARM', further supports the idea of a link farm used for malicious redirection or SEO poisoning.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=where%2527s+my+water+apk+download+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f8a1fa17d897.pdfIn PDF document text
    • https://pudarafuweza.weebly.com/uploads/1/3/4/4/134479559/15d287bb139a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5fad541be04f4.pdfIn PDF document text
    • https://ruzunaxatan.weebly.com/uploads/1/3/4/3/134340268/xodila_wewotovezunoxu_divawaxixeloxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418781/normal_5f95aeb2a9c9c.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://uploads.strikinglycdn.com/files/9794afc9-82a3-47be-9f4f-45e68fd4aee0/capitol_theater_showtimes_tomorrow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a5c1858-42dc-43d0-b0c4-4af4a93368d4/snes_castlevania_dracula_x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce62e25-9fbd-498f-99a3-8f8669208391/gikutakatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab99b1e0-70c6-484d-bb45-894201d1728b/83292939543.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/diego_sanchez_ufc_228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e2a440-0cd5-49c1-8489-0f7636208aab/long_walk_to_freedom_bangla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca1e12d4-54ee-414a-9e3e-5c1105f6f809/last_day_of_june_walkthrough_old_man.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20064835-7d8a-4f04-bf50-aa3a2089db64/nutujilililipusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e51b376-2768-42db-95ab-4df49685937b/21418967578.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB04E 5328 bytes
SHA-256: e6d451339839b522c62150d3f064ce3e7abfaa09559c68ae84fe08f8f77be2a1
font_01_sfnt_off0000c267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC267 10004 bytes
SHA-256: a6cb80eb6f2a32b1dd6cc88037f872710e6a8e9c3d6d69ccfc41bdf6395db9aa
font_02_sfnt_off0000e4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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