Malicious PDF — malware analysis report

Static analysis result for SHA-256 47854a2d61854123…

MALICIOUS

PDF

84.4 KB Created: 2021-03-15 12:23:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c7d9ddd6a58e87451caa52427bbf2c98 SHA-1: 2856c87b10e295ee0e762169c78f4aa82f5fd227 SHA-256: 47854a2d61854123a7b55c715a730fec14500db09779e6eaa26cdacf2795e440
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, indicating it functions as a link farm. The primary URL, 'https://fokemale.ru/strik?utm_term=the+city+and+the+pillar+pdf', suggests a potential phishing or spam campaign. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://fokemale.ru/strik?utm_term=the+city+and+the+pillar+pdf PDF link annotation
    • https://cdn.sqhk.co/zelagagunogo/hcha3nn/duck_hunting_texas_guides.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/largest_economies_of_the_world_ranking.pdfIn PDF document text
    • https://cdn.sqhk.co/zaliroded/3jjFjiL/vaminagupebirana.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/f4fgjia/resoxekafakojudujibe.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/cgjaiaq/19789115137.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/dPhCJhf/my_little_baby_song_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/fiiWiab/super_bass_booster_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tusujoxaseru/rgftWE9/9143474285.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/siemens_plc_hmi_programming.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/ooQih4h/26560123794.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/4hehe8T/h_r_word_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/rizanatu/mKc2HDR/arithmetic_progression_word_problems.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/zBrgige/98799261003.pdfIn PDF document text
    • https://cdn.sqhk.co/dufolatik/f5shbij/stylish_fonts_copy_and_paste.pdfIn PDF document text
    • https://cdn.sqhk.co/zajagatetode/kQyehcS/where_to_find_reaper_leviathan_eggs.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/Ihhm8kO/wesasojaserojidaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/22a4837d-4365-4198-8517-ebe9ccdeb56f/25295749578.pdfIn PDF document text
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_1ef22e7693664b9396be7fbccb68b441.pdf?index=trueIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/how_to_reset_esi_phone_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11b26a91-1947-4067-9c6e-896a8571e450/free_will_define_in_literature.pdfIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_8211dfdf04c247b1834a32a0baf4270f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/97172d07-0771-421d-a91c-fbc0188bfb7e/tc_helicon_voicelive_2_manual.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/78590091868.pdfIn PDF document text
    • https://f4e740b0-69d0-4d5c-a0c7-362dc6b2ad6d.filesusr.com/ugd/0356fc_f1095e5026ec4142a09a4dfab140b4a8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7259be8e-2178-4633-8c64-b9e08a92c153/50852342743.pdfIn PDF document text
    • http://xabudavadeguvo.myartsonline.com/loop_antenna_design.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 4796 bytes
SHA-256: 10eb99c9e754732a48afd3c273f1038ce409cd00742c4a95dd3d2e5390597b26
font_01_sfnt_off000110bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BB 11296 bytes
SHA-256: 0381e8c980db8035f0ce9510c52984158797152b22e6b6c5b275bba25eac5236
font_02_sfnt_off000135e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E0 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3