Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c002c615d63c968…

MALICIOUS

PDF

62.5 KB Created: 2021-01-16 11:48:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 11364012a06c30a3cb8ababdc1985077 SHA-1: 33473918915a2ba438e3635beb438261676d4f8b SHA-256: 8c002c615d63c968d4bb7b59669fa0d7dc5a451a0fa1ae6a27fefcc4cfb3ad47
244 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm on disposable hosting. The embedded URLs, such as 'https://ggtraff.ru/123?utm_term=asdf+movie+11+backwards', are indicative of phishing or malware distribution attempts. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct users to malicious content, aligning with T1566.001 (Spearphishing Attachment).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://ggtraff.ru/123?utm_term=asdf+movie+11+backwards In PDF document text
    • https://cdn.sqhk.co/delojiwuguj/6sGsahe/duzewigesux.pdfIn PDF document text
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/xoxemoji.pdfIn PDF document text
    • https://vavezumejut.weebly.com/uploads/1/3/4/6/134655991/poxaseloperek.pdfIn PDF document text
    • https://gisimezibeze.weebly.com/uploads/1/3/0/8/130874543/likipakakisat-bomibadonawesux-jozelib-sadaxinobeno.pdfIn PDF document text
    • https://cdn.sqhk.co/lizuxutagisu/bjfheii/dragon_wallpaper_hd_download_free.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/busixakowun_zefisuni.pdfIn PDF document text
    • https://funofumid.weebly.com/uploads/1/3/4/8/134886651/4283592.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421038/normal_6002a693e602d.pdfIn PDF document text
    • https://site-1255234.mozfiles.com/files/1255234/bluetooth_usb_dongle_driver_windows_7.pdfIn PDF document text
    • https://fizegebukuri.weebly.com/uploads/1/3/1/4/131453213/kixuvamasopekeguxoza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f872652e208f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5f90ff5ba0dd3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejexe/disosojasob.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/bajrangbali_images_free.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_off0000b907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB907 5532 bytes
SHA-256: ce22551d973aa5acd04f15f7e343c18d78020444121e81c8ba12182e01c688d9
font_01_sfnt_off0000cbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDF 9880 bytes
SHA-256: f73a8dd0bd312ff2fc3aef1e4ddc4e34bd978bcb0948c2eea3b860a8b6158c6a

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