Malicious PDF — malware analysis report

Static analysis result for SHA-256 c06dceaba554d295…

MALICIOUS

PDF

74.3 KB Created: 2021-01-22 23:38:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b1abf322950f276c8bfe19206bd337be SHA-1: ce94549c0673b44577970de54a0936d0c378fc64 SHA-256: c06dceaba554d295e6f5f9d3f81d0c2b5b15379e424f3f5f77492a176b3d3200
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating a link farm designed to redirect users to potentially malicious sites. Heuristics like 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the document, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=john+deere+lawn+tractor+manuals+pdf PDF link annotation
    • https://site-1177442.mozfiles.com/files/1177442/wallpaper_gamers_hd_4k_black.pdfIn PDF document text
    • https://site-1177946.mozfiles.com/files/1177946/wolfcamp_shale_formation.pdfIn PDF document text
    • https://site-1172329.mozfiles.com/files/1172329/1520660528.pdfIn PDF document text
    • https://site-1084296.mozfiles.com/files/1084296/vivah_movie_ka_gana.pdfIn PDF document text
    • https://cdn.sqhk.co/fatobaliv/Iidjawv/chop_chop_slices_game.pdfIn PDF document text
    • https://cdn.sqhk.co/ziratede/7hehhgj/5703402640.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/ljhxvnt/splendor_board_game_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/xanapaje/gcSgcgj/the_mars_movie_tamil_dubbed.pdfIn PDF document text
    • https://jibajupo.weebly.com/uploads/1/3/1/6/131636806/36645656f0.pdfIn PDF document text
    • https://site-1177365.mozfiles.com/files/1177365/capita_equalizer_2021_review.pdfIn PDF document text
    • https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/872126.pdfIn PDF document text
    • https://gabejudunutulan.weebly.com/uploads/1/3/4/8/134887900/fc2353008.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/funapesuviw.pdfIn PDF document text
    • https://site-1168088.mozfiles.com/files/1168088/american_racing_pro_series_drag_wheels.pdfIn PDF document text
    • https://site-1180493.mozfiles.com/files/1180493/offroad_jeep_prado_driving_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/jfeNlJc/snapseed_app_for_macbook_pro.pdfIn PDF document text
    • https://site-1168339.mozfiles.com/files/1168339/wesipogod.pdfIn PDF document text
    • https://site-1174356.mozfiles.com/files/1174356/vozuxenon.pdfIn PDF document text
    • https://site-1176728.mozfiles.com/files/1176728/twisted_wonderland_riddle_gallery.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/hjH3Vhc/fruit_ninja_hack_apk_free_download.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_off0000e4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A9 5476 bytes
SHA-256: 2f79537d25f9bf401f4f36b9c50aec5436feb389f2b491c29deb55e437938e37
font_01_sfnt_off0000f733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF733 10772 bytes
SHA-256: af33997f07e546db85b306930fdeaef946eaf558b89bc88463bb056bc0a3ce5b