Malicious PDF — malware analysis report

Static analysis result for SHA-256 82691e785e89fcee…

MALICIOUS

PDF

62.7 KB Created: 2020-03-28 02:58:21 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2e29b38581cadcbc226cb37338791892 SHA-1: e8fb46bc16e51b953fadddd922dab662bd1e74da SHA-256: 82691e785e89fcee91f86f3c6d99ee97f4fc662bf6c3cbd72ba384eb19d0f315
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to other PDF files, which is indicative of a link farm or SEO abuse. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URLs suggests a distribution or redirection mechanism. No scripts were extracted, but the sheer volume of outbound links is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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 http://hounslowgiving.org/uploads/1/3/0/4/130483348/130483348.html#20+oraciones+con+pronombres+personales
    • http://thecurrentcafe.com/uploads/1/3/0/5/130551661/b88e3c497e452.pdf
    • http://martinezbraceslv.com/uploads/1/3/0/3/130323908/d0c950.pdf
    • http://tacaccountants.com/uploads/1/3/0/5/130588550/915904.pdf
    • http://jordynoakland.com/uploads/1/3/1/3/131383746/178a2d0.pdf
    • http://sixwaysfromsunday.org/uploads/1/3/0/3/130379415/d9fa05b412244.pdf
    • http://digitalheartstrings.net/uploads/1/3/0/5/130590321/4767410.pdf
    • http://amberbellemusic.us/uploads/1/3/0/7/130740077/fedd26d88.pdf
    • http://mhschangefoundation.org/uploads/1/3/0/6/130639212/pebomiwagula-vekuzawojuwe-xemiji.pdf
    • http://rocksolidskilltraining.com/uploads/1/3/0/5/130550903/relumugigumave_gofowop.pdf
    • http://www.hkscmi.com/uploads/1/3/0/5/130546333/e57ba9f8.pdf
    • http://www.krystadesigns.com/uploads/1/3/0/5/130552097/da417cf.pdf
    • http://sinergiakinesiologiayfisioterapia.com/uploads/1/3/0/6/130604903/98bb4.pdf
    • http://velocitydancestudio.com/uploads/1/3/0/6/130639872/nezuvoxu_vovijexejurof_pugizuze.pdf
    • http://cflucktraining.com/uploads/1/3/0/3/130323311/vobijosemafo.pdf
    • http://verniceartmagazine.com/uploads/1/3/0/8/130814172/mazugiwavizidu.pdf
    • http://kinderwebz.net/uploads/1/3/0/8/130814007/012003c76b87.pdf
    • http://�refam.dk/uploads/1/3/0/4/130478520/telafeji-vanijopuron-pufikotasunomo-mofifokabikenis.pdf
    • http://fbcnewton.net/uploads/1/3/0/7/130739597/4667158.pdf
    • http://cutleryclubofamerica.com/uploads/1/3/0/7/130775374/272797.pdf
    • http://www.bestreviewscbd.com/uploads/1/3/0/8/130813466/d2b8437.pdf
    • http://thedepths-game.com/uploads/1/3/0/5/130541597/7915007.pdf
    • http://studioschmidtllc.com/uploads/1/3/0/3/130379251/vuvawitinexitop.pdf
    • http://commonwealthneuropsychologicalassociates.com/uploads/1/3/0/5/130589198/4906548.pdf
    • http://www.jennathompsonmusic.com/uploads/1/3/0/5/130590282/kumenajeleji-moraxulu.pdf
    • http://www.dryeyestl.com/uploads/1/3/0/6/130621757/vuzubigebedikat_tepifupuzowelib_xupipobenajoroz_ditamimifujikus.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b377.bin
3ccb28c066ba630b9bafd4990343fce24d4a5f13c56fc046a21f616326171ef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB377 9100 bytes
font_01_sfnt_off0000d493.bin
41fe86bbb02ed6d595784473ead779d86c0e949a1d4f1b02e12a05451a664fb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD493 16756 bytes

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