Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b61bfb162cce40…

MALICIOUS

PDF

82.7 KB Created: 2021-04-01 15:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 16a93a13201b3fb5778fdf516396bb31 SHA-1: b1aa0ebe4ecc8afc37656c43f18568ff3944b13a SHA-256: 96b61bfb162cce407e9c3b4530fe2c423de1c6897babf22b838424e3e9d4b208
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=dangerous+power+e1+manual PDF link annotation
    • https://cdn.sqhk.co/doporaba/Cjd0obb/boxing_news_nate_robinson.pdfIn PDF document text
    • https://cdn.sqhk.co/gujipiror/cR5tiiL/castle_defense_2_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/7JMGQTU/vosibomabaxapaxesawevewe.pdfIn PDF document text
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/sakumewu.pdfIn PDF document text
    • https://cdn.sqhk.co/tusupuwadoda/bhjgjgd/asda_groceries_online_shopping_uk_login.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/e9MhjS8/runescape_fish_o_matic.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/ggUDSx8/87884890608.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/hiegic7/17470845938.pdfIn PDF document text
    • https://jupurelapuloful.weebly.com/uploads/1/3/3/9/133997255/8876177.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwiketi/f2MicPV/gazukanegova.pdfIn PDF document text
    • https://mifetajuluvonu.weebly.com/uploads/1/3/4/6/134610270/b6ab53ee7be266c.pdfIn PDF document text
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/74d0558.pdfIn PDF document text
    • https://dolujutizividev.weebly.com/uploads/1/3/4/8/134864897/jozoxipibixo.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/rosevulejamiziz.pdfIn PDF document text
    • https://kujepilam.weebly.com/uploads/1/3/5/3/135343620/tiwaviburi.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/frhiXib/mcat_test_questions_of_the_day.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/battletech_mechs_to_keep.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/wuzamogevupafijagajul.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/how_to_know_my_debit_card_number_sbi.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/micro_turbine_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/moultrie_cellular_camera_customer_service.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/xetamijaxo.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_off000104d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D9 5280 bytes
SHA-256: 0a516ceb848200364301436a2055088e1fc85aa73851a0e5d4cdeb908069e06c
font_01_sfnt_off000116da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DA 11300 bytes
SHA-256: 38507213c29eb506f70fa51160edda5ebbdbf59a37370179af610a7b45929fcf

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