Malicious PDF — malware analysis report

Static analysis result for SHA-256 930a758c6429e77a…

MALICIOUS

PDF

71.1 KB Created: 2021-03-29 18:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cc2a139ef780da2cce081ded3f05ec8 SHA-1: bd6d891054e1b619892f2463cdfdacc742c22fb0 SHA-256: 930a758c6429e77a896bbb8e3605694106c476e3fe8cc260e780c454c26cafa4
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to SEO-optimized PDF documents, suggesting a link farm or content-spinning operation. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing or trojan distribution attempt. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=sharp+convection+microwave+r990ks+manual
    • http://fipizilemuwob.medianewsonline.com/83253664658.pdf
    • https://nabinavupofi.weebly.com/uploads/1/3/5/3/135350319/duwovekumikaja.pdf
    • https://nomikevokatipo.weebly.com/uploads/1/3/1/8/131859895/rijabenadigepi.pdf
    • http://bitalotava.scienceontheweb.net/buwasadidatupuwumivusefe.pdf
    • https://pekatube.weebly.com/uploads/1/3/5/3/135393066/7638763.pdf
    • https://cdn.sqhk.co/bogovureg/r7XkKje/68253801017.pdf
    • https://cdn.sqhk.co/milibotobov/hijezkU/96995670844.pdf
    • https://vinebikeja.weebly.com/uploads/1/3/4/7/134712271/7292347.pdf
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/gerur_fokanevanuwesat_xinowuse.pdf
    • https://dajoromu.weebly.com/uploads/1/3/4/3/134309711/gafidapijunusodeka.pdf
    • https://mowolonob.weebly.com/uploads/1/3/4/8/134874237/dusurukemanuk.pdf
    • https://cdn.sqhk.co/zofizitene/tig2RK9/hp_smart_tank_515_review.pdf
    • https://fenipedixov.weebly.com/uploads/1/3/5/3/135385823/tulugonorike.pdf
    • https://cdn.sqhk.co/pabelewexo/dZiFSih/kujudusudakixawajuduziwer.pdf
    • https://ruzamugube.weebly.com/uploads/1/3/4/0/134040566/fewijukiruxivoxaweze.pdf
    • https://xipurewaxo.weebly.com/uploads/1/3/4/7/134759043/8fc1d2ec.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/saziwijaxodav/abrasive_water_jet_cutting.pdf
    • https://s3.amazonaws.com/muvevanepen/how_to_fix_a_disc_that_wont_read.pdf
    • https://s3.amazonaws.com/resisuna/how_to_turn_on_york_diamond_80_furnace.pdf
    • https://s3.amazonaws.com/bomupi/tumawuda.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_off0000d36c.bin
35b384b9ff0faf9a718ced1a8974fa36eb4e73a1f778ed2f1e4b3259488c125e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD36C 5788 bytes
font_01_sfnt_off0000e709.bin
62d27247453cd7d91723e57300948e43b6228210966db91a4c3e3e565469da0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE709 11696 bytes

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