Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76ab973b3226d21…

MALICIOUS

PDF

67.8 KB Created: 2020-12-13 21:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d8763852cb89b0327baa66f68e33a52 SHA-1: 77d8ddf3d99cc90341f94b9c1a2bef3c91cda102 SHA-256: a76ab973b3226d2199365da106749ae3c640c267d086d35017fbec10fa5634e0
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection (Pdf.Phishing.Trojan-d2568dad23a94d95) and an ML classifier, indicating malicious intent. The document body and extracted URLs suggest a lure related to an iPhone accessory, likely to trick users into visiting malicious sites. The presence of external URIs and link farm characteristics further support a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafficel.ru/123?utm_term=iphone+8+plus+waterproof+pouch
    • https://valojeruxul.weebly.com/uploads/1/3/4/6/134681631/wejazeloropu.pdf
    • https://wikukexinuxox.weebly.com/uploads/1/3/4/3/134349372/zogiwupat-ribotawegati-morizubaxawofij.pdf
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/0d3609706a764.pdf
    • https://nepejudakolop.weebly.com/uploads/1/3/4/8/134876169/3228039.pdf
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5f94afa37a275.pdf
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5fc224f3141e1.pdf
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/7f9d8d928.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rozebofukixus/irish_mythology.pdf
    • https://uploads.strikinglycdn.com/files/e2dc7b2d-54af-460b-9bfc-36695a74a523/suxen.pdf
    • https://uploads.strikinglycdn.com/files/95c17e2b-7b77-4359-b00d-d7734a95e4aa/85091747417.pdf
    • https://uploads.strikinglycdn.com/files/ce8cfe50-fad6-4132-9691-fb0b74f0eeca/canon_pixma_mg2922_wireless_setup.pdf
    • https://uploads.strikinglycdn.com/files/bd9980c3-2a2a-4e6d-9db9-8dacc2e94950/37860561106.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb9c.bin
568cebc2da9f82d432290959f65b7bd0c28eb4f03c61e6063384f9c01e522b52
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9C 5328 bytes
font_01_sfnt_off0000ddc9.bin
341edd3ec8144477d90f12e0791c966bc7da05e8465d09038b1599222afe75d9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC9 10856 bytes