Malicious PDF — malware analysis report

Static analysis result for SHA-256 91240e89aa004d12…

MALICIOUS

PDF

75.4 KB Created: 2021-03-15 13:04:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 563fc4bbf1416d618104fa43f9573a02 SHA-1: 799db890da950b2ce08e6041f470d9fceeaf22ae SHA-256: 91240e89aa004d12bae2219e34409da58bc93f2bfc8fab1947e4db82ed7bf7fb
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 other PDF files, suggesting a link farm or SEO spam operation. The embedded URL 'https://maypoin.ru/strik?utm_term=cuantas+clases+de+marihuanas+existen' is directly related to the document's apparent theme. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/strik?utm_term=cuantas+clases+de+marihuanas+existen
    • http://draiwenstore.online/samsung_rf267abrs_refrigerator_leaking_waters2jw5.pdf
    • https://cdn.sqhk.co/kekotenonaxu/jawXvg0/87039874381.pdf
    • https://cdn.sqhk.co/dedenijikal/cihjhjs/smith_s_weekly_ad_farmington_nm.pdf
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/660638.pdf
    • https://cdn.sqhk.co/wakivunet/hcjaChc/gun_shoot_war.pdf
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/1720069.pdf
    • https://cdn.sqhk.co/dudugetogi/6flGKYD/nizaretukowudusibilivuru.pdf
    • https://menuzuxa.weebly.com/uploads/1/3/1/0/131070619/5187290.pdf
    • https://nobawevedidilut.weebly.com/uploads/1/3/1/3/131379382/f31fb.pdf
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/e889a42f743e.pdf
    • https://cdn.sqhk.co/satidaruxami/icKPiit/fake_shaver_prank.pdf
    • https://cdn.sqhk.co/kulobibab/eibgehd/changa_video_app_best_video_editor_video.pdf
    • http://goossyy.online/brother_xr_65t_sewing_machine6t7h3.pdf
    • https://cdn.sqhk.co/mitebosareki/hKZ65hd/werewolf_3d_model_print.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kuboki/80782388774.pdf
    • https://s3.amazonaws.com/purixifusipelid/zozav.pdf
    • https://s3.amazonaws.com/sakaburepagase/45062839609.pdf
    • https://s3.amazonaws.com/ragejufa/adobe_reader_version_8_free.pdf
    • https://s3.amazonaws.com/resabomibogodaw/77285892988.pdf
    • https://s3.amazonaws.com/pasawe/cdc_group_b_streptococcus_guidelines.pdf
    • https://s3.amazonaws.com/rozebofukixus/chief_architect_3d_software_free.pdf
    • https://s3.amazonaws.com/xeropizuwe/sacred_geometry_artwork_for_sale.pdf
    • https://s3.amazonaws.com/firigugixujotov/wedunobusapozubekar.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_off0000e721.bin
f2469c0f0cfa30cdbedb29c9bee5fb3ce3e11f043e525d1a647e91ad6b53e06f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE721 5152 bytes
font_01_sfnt_off0000f875.bin
690ac3152fc0bd8b25ac13503f88c33f4fc9e9d95a1eab4504b69e63f146b0c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF875 11800 bytes

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