Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a1ba112f6d46a7…

MALICIOUS

PDF

101.3 KB Created: 2021-03-24 20:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7c7e376ea9fa6f5513a912cb59488403 SHA-1: 593cb73ed492897789c2774e9134387bba14b496 SHA-256: 46a1ba112f6d46a7a01917c1e8b2c6c4e1f945efb0b92e82f5cc2a7291c36939
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The document body, though heavily obfuscated, contains a title that appears to be a lure for users interested in tabletop RPGs.

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
  • 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://ponafet.ru/strik?utm_term=how+to+write+a+tabletop+rpg PDF link annotation
    • https://cdn.sqhk.co/riragimi/gf5jgjf/77538628462.pdfIn PDF document text
    • http://getveran.site/esc_2019_guidelines_diabetesffo0x.pdfIn PDF document text
    • http://norasuzajo.mywebcommunity.org/centrales_termicas_de_vapor_y_generadores_de_vapor.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/9768708.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/eYiige2/the_whip_tavern_reviews.pdfIn PDF document text
    • https://leruvipox.weebly.com/uploads/1/3/5/3/135347136/fesitinuvijipusof.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/hc0qgjj/48972775132.pdfIn PDF document text
    • http://atomyimperial.ru/how_do_you_make_grape_wine_at_home57kxy.pdfIn PDF document text
    • https://fubofekibodubeb.weebly.com/uploads/1/3/4/4/134483790/7ffbce297a575.pdfIn PDF document text
    • https://piligerababuge.weebly.com/uploads/1/3/5/3/135324290/ruregapodo.pdfIn PDF document text
    • https://cdn.sqhk.co/gezubesekar/jcMEhat/27125802396.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/luvekojigo.pdfIn PDF document text
    • http://vufajed.getenjoyment.net/how_much_do_esl_online_teachers_make.pdfIn PDF document text
    • https://cdn.sqhk.co/teduwugevoki/iighyWr/funny_bad_guys_in_movies.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/169a4dda-7e91-4e3b-93f2-c9f27b423a34/cultivos_de_arroz_en_mexico.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/marshall_jmp-1_preamp_presets.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/matul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/814a0a2b-1c13-4107-9c82-36b7d4136e83/57689575015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ad4d18-df50-4898-b3ee-6858b58b976f/will_evening_primrose_start_contractions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e54a44a-5a77-4694-b34e-c97fbc9c57ea/is_br_acid_or_base.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7960497f-bc24-49cd-9fe7-f4f713bd834c/rutow.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_off00014e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E17 5000 bytes
SHA-256: 4714aac23e84b43c16a2b07edf8cba84093a3d61e5c99c9bee5fafdb8580a3ee
font_01_sfnt_off00015f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F37 11608 bytes
SHA-256: c071a64b9955dd2b4a02e07c3eba095d177d302e03df096357f76f52b16c15f4