Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cb47d427a2001c…

MALICIOUS

PDF

87.7 KB Created: 2021-02-28 08:05:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5c3fce9557aed0bdf613d61537148170 SHA-1: 5d01408dfa6ac350ce3db66b572fcde0a594f2c5 SHA-256: 08cb47d427a2001c714556b22dd8e357e0e2aba9550e90c4be57eccf527a4b57
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/wix?keyword=law+and+order+svu+baby+killer+cast PDF link annotation
    • http://zuvels.xyz/unscramble_sentences_1st_grade_worksheetsv0mn4.pdfIn PDF document text
    • https://sakafafemowuva.weebly.com/uploads/1/3/4/6/134694971/vumamosewitarat_xiwoxekosusavuz.pdfIn PDF document text
    • http://dfwshootersupply.com/border_movie_song_wapkingb7l3f.pdfIn PDF document text
    • http://obschee.xyz/820793576603ln2r.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/fjf6hha/hello_neighbor_hide_seek_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/jhgiYME/78916984524.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/a_time_to_kill_movie_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/ugdjjJn/pozuwaxujo.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/a97cd6f7fe78.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/6pieNSI/strike_force_mod_apk_unlimited_money.pdfIn PDF document text
    • https://femerofuvarilef.weebly.com/uploads/1/3/4/0/134012326/bukirajevitatijawab.pdfIn PDF document text
    • https://cdn.sqhk.co/pevizopubok/egBgclb/where_to_buy_jolted_cow_ice_cream.pdfIn PDF document text
    • http://vozivovog.scienceontheweb.net/54948000524.pdfIn PDF document text
    • http://circleshtang.xyz/1183223613lbmaq.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/jhoXqxW/zivorofiv.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/78015012992.pdfIn PDF document text
    • http://dronextactical.xyz/70521158082kmmk6.pdfIn PDF document text
    • https://jifonoru.weebly.com/uploads/1/3/5/3/135316211/d71892a5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392218/normal_5fc5fc7c0f729.pdfIn PDF document text
    • https://jakugogafezokev.weebly.com/uploads/1/3/1/4/131437362/zuzod.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/0jf5jcV/18118707805.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabenejajoko.myartsonline.com/how_do_i_program_a_comcast_remote_control.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52A 5332 bytes
SHA-256: 0f223160536618dd7302cd19147da596ac8623098c60c61686cc4c5021a06710
font_01_sfnt_off00010776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10776 4236 bytes
SHA-256: a6c6d53378da330912be0b2593624718bbe95569b510397c70e13acdfe5edef8
font_02_sfnt_off000112d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D8 11184 bytes
SHA-256: 4f0a2e11f8930ab83713966548f255377874eda468ff710b243ef681b299fdac
font_03_sfnt_off00013919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13919 16752 bytes
SHA-256: 961336d18da024619d8853f93e85b5c084237a8f60d69b3631bd3875eae0e3cd