Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92ba837c8c20ff4…

MALICIOUS

PDF

73.9 KB Created: 2021-03-10 05:01:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 9b1a3ec2c3b5c0a5fe9612318432e66d SHA-1: 6473668909e79c43fc99d61d430ef58112ae2bda SHA-256: f92ba837c8c20ff4d6962446333d25612acf6789bd13a718a4549f65b57e7d68
244 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating it likely serves as a phishing or spam lure. It contains a large number of embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document body is heavily obfuscated and appears to contain junk data, suggesting its primary purpose is to host these malicious links rather than convey legitimate information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://yafferge.ru/wix?keyword=citizen+hyper+aqualand+manual In PDF document text
    • http://folutelegaraz.iblogger.org/gekuxegiforejujabozisu.pdfIn PDF document text
    • https://muvesajaduxu.weebly.com/uploads/1/3/4/0/134012660/7712866.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/jlRfhhK/secret_codes_for_unlocking_android_phones.pdfIn PDF document text
    • http://iranianvc.com/kuwaxatarubenalacjkcs.pdfIn PDF document text
    • http://lisolu.org/15406296656hzwxz.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/jeEgeia/gatuganefubabuful.pdfIn PDF document text
    • http://christinaanddavid2019.com/el_secreto_de_mi_marido_google_drivefcvdv.pdfIn PDF document text
    • http://bluebadgeapproval.com/bonabat30y1.pdfIn PDF document text
    • https://gotizede.weebly.com/uploads/1/3/2/6/132695714/mopebibutopozenonumu.pdfIn PDF document text
    • http://gokutasajegeraj.22web.org/jegikoba.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/hI4hagj/pedarebemosupidevebepiwin.pdfIn PDF document text
    • http://plafond.xyz/mansions_of_madness_app_ps4je80h.pdfIn PDF document text
    • https://gixebufenof.weebly.com/uploads/1/3/6/0/136082423/jazogagugu.pdfIn PDF document text
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/4014372.pdfIn PDF document text
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/52fe0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_4fadda96ebdd4882b3dda0c0e99745e9.pdf?index=trueIn PDF document text
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_a19e6a3acaa5420b9d4ac1c10e7d735f.pdf?index=trueIn PDF document text
    • http://pusonaduxani.rf.gd/derivatives_of_inverse_trigonometric_functions_worksheet.pdfIn PDF document text
    • https://0fdd9f25-8366-4660-9463-376fd915ad39.filesusr.com/ugd/c16cf9_3cd372d5612c45f78607c7dc12ca7251.pdf?index=trueIn 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_off0000e313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE313 5204 bytes
SHA-256: f0cf95cb4d1a4ad1206fba953a5bc73381ce8005a400d2f1672f30dbf95760be
font_01_sfnt_off0000f4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A3 10608 bytes
SHA-256: 08edfba3021a600b787b50fc5f898a87099d7aba8b8e29430b3dcaa5191ebcba

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