Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ac0f4b9ce0e9206…

MALICIOUS

PDF

65.5 KB Created: 2020-12-27 03:34:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0ae40969bedce99fd30997ac00ea5448 SHA-1: 42a97b45c0adfd18aab5d0bfa6cc6a05eb641801 SHA-256: 8ac0f4b9ce0e92065942905459acdf108c0f70e25929412e5397b1ba2de95005
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a lure related to a 'weather report'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to host malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or redirection to a malicious site.

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://trafffi.ru/aws?utm_term=madanapalle+weather+report+live PDF link annotation
    • https://pilituxasi.weebly.com/uploads/1/3/4/6/134685590/kodorizukuzaru_vikovemi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368265/normal_5fc3eafbed571.pdfIn PDF document text
    • https://cdn.sqhk.co/tevenijubuso/YV3gGja/33951189197.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/Dihcbos/punebedenumosojefabavese.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/bSmyihX/the_legacy_golf_club_toledo.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/fae8ad2f-c169-4b1d-aecc-4f59188dde0b/9334817289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89705bcc-fba4-4547-840f-89a20b99c548/gewuzofofogazuforije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6247b099-44f0-4dde-82a2-e225484ab7db/penofin_red_label_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f712560c-57b7-45ef-b5a5-186107261998/69946750533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fefbfed7-8f3e-4710-9c03-ee0f98aa0f11/return_man_zombies_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcfc6c7a-e815-433c-a0da-1d57190714e8/tubuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14db03dd-56dc-40d6-831d-3acd9b38319b/gebifepujuruzu.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_off0000c42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC42D 5028 bytes
SHA-256: 3f82099c373cfa5284e3e1a95fb61ed6681ca4ac7c850dc833b9424e27214e3a
font_01_sfnt_off0000d55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55E 9980 bytes
SHA-256: b07fa73c07abb7a45c621e912229bafc862a53fc5bdb784dbf14f1a679030fef

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