Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e62d7266b7c829…

MALICIOUS

PDF

77.6 KB Created: 2021-01-11 11:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 54ebb822baeed752bac10fdcbe813c4f SHA-1: 07591030dd37b93a972b5b0b34d77b1369fcc106 SHA-256: 16e62d7266b7c829728e02cae387af383423c9909c2e22f2ab9a72587798b0ab
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable domains and are likely part of a link farm. One of the URLs, 'https://traffking.ru/aws?utm_term=transformer+des+centiares+en+m%25C3%25A8tres+carr%25C3%25A9s', is identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?utm_term=transformer+des+centiares+en+m%25C3%25A8tres+carr%25C3%25A9s In PDF document text
    • https://site-1206032.mozfiles.com/files/1206032/world_war_tower_defense_games.pdfIn PDF document text
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/gosivapazanajebana.pdfIn PDF document text
    • https://donixefafara.weebly.com/uploads/1/3/4/3/134310569/nesabesogib.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/hiY6hfx/new_ringtone_2019_tik_tok.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/n1gcrjk/1154058649.pdfIn PDF document text
    • https://cdn.sqhk.co/zevolazezag/ghjglji/card_party_uno_online_games_with_friends_family.pdfIn PDF document text
    • https://site-1171785.mozfiles.com/files/1171785/dino_war_rise_of_beasts_apk_mod.pdfIn PDF document text
    • https://zuvagenujak.weebly.com/uploads/1/3/4/4/134454716/2e793889a.pdfIn PDF document text
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/puvulirome-firaxowijit.pdfIn PDF document text
    • https://pinabufibofux.weebly.com/uploads/1/3/2/6/132682338/rifefek-bukug-degidajokatat-liraxuz.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/zovujebuxepasom.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/PHggCMZ/mivexuginiwiguto.pdfIn PDF document text
    • https://site-1166064.mozfiles.com/files/1166064/origami_box_with_lid_one_piece_instructions.pdfIn PDF document text
    • https://site-1196011.mozfiles.com/files/1196011/wonadawuxujuxixijawawova.pdfIn PDF document text
    • https://site-1172776.mozfiles.com/files/1172776/granny_pods_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/fofubulami/dd5ijig/woteguzojafep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000edf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF7 5368 bytes
SHA-256: e4da740bc89073a32f3482cd3110fd43bdde38831c74aab03beab395c378c741
font_01_sfnt_off0000ff82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF82 12552 bytes
SHA-256: 3450a4fa3113d290d3713c050a14cb0c127f92d45e767323e107d6959400df1e

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