Malicious PDF — malware analysis report

Static analysis result for SHA-256 973e6e4a77290863…

MALICIOUS

PDF

81.5 KB Created: 2021-03-06 00:26:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9cdd642220ff9716533e7281499e7ea1 SHA-1: 3c058c18b0bdabcf588a191984fecc1cdfedad47 SHA-256: 973e6e4a77290863d1486e5c719ae98d7d719676ecc2a102606f8d135b25650b
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 0.9967

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/wix?keyword=unblocked+games+car+games PDF link annotation
    • https://cdn.sqhk.co/midubevine/SfuMiib/puzefogi.pdfIn PDF document text
    • https://xadafujivesa.weebly.com/uploads/1/3/1/3/131397927/zovomuvidomevorumupu.pdfIn PDF document text
    • https://lemorixumo.weebly.com/uploads/1/3/4/7/134748879/570f4674ae0e4.pdfIn PDF document text
    • https://cdn.sqhk.co/tolademapati/hhKLhfl/lekoloxedesikajajuxorek.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/TOjjfCi/wheel_of_fame_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/hfigibK/loughton_car_crash_latest_news.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/wugajewujegup_lajudidaxukona_kibalafediveza_wuxuvaw.pdfIn PDF document text
    • https://jabukosiw.weebly.com/uploads/1/3/0/8/130874379/gileruz-zuwafabopar-zopotuxu.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/8jciajg/ocerin_guide_tricks.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/hc2gdhi/mixufopugaboteru.pdfIn PDF document text
    • https://cdn.sqhk.co/bijininabex/ljdxL1b/defewozo.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/nIhidEz/brick_builder_lego_technic_2019.pdfIn PDF document text
    • http://instapriz24.online/84987949189is1xv.pdfIn PDF document text
    • https://cdn.sqhk.co/livisade/wnheHyB/xugogaloxilaluware.pdfIn PDF document text
    • https://remejatezikame.weebly.com/uploads/1/3/1/0/131070309/6799497.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/ibicPih/white_siberian_husky_puppies_for_sale_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/ninuxoti/hhcjghd/candy_cake_maker_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kamupudoro/gMThfha/radiant_definition_physical_science.pdfIn PDF document text
    • http://urott-hu.com/us_constitution_bill_of_rights_instituteeol74.pdfIn PDF document text
    • https://cdn.sqhk.co/fowurona/hfjgPhS/diy_wood_file_cabinet_plans.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/Jhafyhb/savokomuxarogunuvolozi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d5896e3-4660-45f0-b31f-908b4b189ed1/kafoxolapisajaxifagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80d04544-f162-4de3-8452-31413be45f5f/tepoxetaxusukolukuxuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c03dcec-25fe-46f8-86f4-a5db801e7fec/61814501269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d91e3519-5b24-4416-aebf-07d0632ba69f/how_do_you_read_a_vacuum_gauge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f982e06c-573d-4c14-bbeb-19c01c81f00e/how_to_set_up_graco_pack_and_play.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_off000102d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D5 5456 bytes
SHA-256: 2ad432e5eb400f2822fc46298cfdf2cf11d6870070ae97339d480ac9ccbf8ea9
font_01_sfnt_off0001154c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154C 10348 bytes
SHA-256: 9af9eed11a3a76de79cce9d0710b5b5a8c6c72fdf23adb01a01000502579933c