Malicious PDF — malware analysis report

Static analysis result for SHA-256 84161584227b907d…

MALICIOUS

PDF

70.0 KB Created: 2021-03-08 00:03:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 9563d188cdff30ad3900336e18262b6f SHA-1: b4b1c6d5f13d791a4b87876378e12fc003d1a1b4 SHA-256: 84161584227b907d3b09f3e753f6da3b9e9094e516e103c5394068930807f020
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The primary external URI points to a keyword-searchable URL, likely intended to mimic search engine results for a user's query.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://jacksth.ru/wix?keyword=1994+chevy+s10+owners+manual PDF link annotation
    • https://sixalusizefew.weebly.com/uploads/1/3/1/3/131378898/nevofu.pdfIn PDF document text
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/jalovigewibuvab-kulosisukesa-puxudibade.pdfIn PDF document text
    • https://mivosubewo.weebly.com/uploads/1/3/1/4/131407796/c6f89.pdfIn PDF document text
    • https://pepevifive.weebly.com/uploads/1/3/4/4/134480859/f15ce2aacdd.pdfIn PDF document text
    • https://gesuveta.weebly.com/uploads/1/3/2/6/132680901/birejuzamoranug.pdfIn PDF document text
    • https://rofokaragi.weebly.com/uploads/1/3/2/8/132815015/kafajazigimi_motagevaba_rokexizeta.pdfIn PDF document text
    • https://bijejumutitin.weebly.com/uploads/1/3/1/4/131454352/mubaludelugafus.pdfIn PDF document text
    • https://vifazadaza.weebly.com/uploads/1/3/4/8/134883600/aa2949579.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_033e51f490cb4ebd984eed47b272cfaa.pdf?index=trueIn PDF document text
    • http://tobewopuma.rf.gd/80017727515.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/zeguro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43fd122a-673d-4c57-a48b-f5f715fcdaf5/declaracin_universal_de_los_derechos_humanos_de_1948.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/carentan_map_won_t.pdfIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_58422c75cceb45e6a4567c1558f25f03.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/webixozubukaviwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199efcd8-435e-4b35-8b0e-a34193c1ab6b/usarec_3.3_example.pdfIn PDF document text
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_eb4d55a837684fcb9ef9e6b5b7ab0334.pdf?index=trueIn PDF document text
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_bfacf3dba5b24d47be6410969ac03560.pdf?index=trueIn PDF document text
    • http://tosogaxaf.rf.gd/sad_alone_images.pdfIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_57ba21c4bbef47669f0c9567e3f1cbba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b291286-880f-4553-b287-699eebac703a/wapukumijaluwivedefan.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/blaze_pizza_franchise_information.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_off0000d439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD439 5636 bytes
SHA-256: 848f3a17dee58c0974191f1db612f8ee24cb7f6841cfde178ad380dbcd488147
font_01_sfnt_off0000e75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75C 10396 bytes
SHA-256: 6f02dc4564dcefaa8228e2984e1e0a4270f7a60140d1009fca5c41866537bfd3