Malicious PDF — malware analysis report

Static analysis result for SHA-256 a529ae8a11559594…

MALICIOUS

PDF

73.6 KB Created: 2021-03-22 20:02:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 42a02f3059b7f109aee95d8dd1ddfef8 SHA-1: b152165cf2434b53f43fbdedc428b31686432e17 SHA-256: a529ae8a115595945764e21012a2e09a0dda4b0f7af7ccb3fc6313d82771a5ce
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous external links to other PDF documents hosted on various domains, including disposable ones. The embedded URLs suggest an attempt to lure users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/wix?keyword=wilkes+barre+ymca+class+schedule PDF link annotation
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/xuvaputokesewuno.pdfIn PDF document text
    • https://cdn.sqhk.co/kifavubivelo/hjdhgc0/ditek.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/fgigjeu/wisigeri.pdfIn PDF document text
    • http://mnogoturov.com/weber_charcoal_grill_cooking_guideb911t.pdfIn PDF document text
    • https://zinenefubodejig.weebly.com/uploads/1/3/4/3/134338026/polorimiwubag.pdfIn PDF document text
    • https://virefogagivagu.weebly.com/uploads/1/3/0/8/130815228/famowegup-defawotu-sobojilagasimob-wazeguzazedekir.pdfIn PDF document text
    • http://moneyindia.site/your_love_never_fails_never_gives_up_piano_chordsrizuf.pdfIn PDF document text
    • https://cdn.sqhk.co/rasadenibe/hahbxBT/new_ringtones_and_notification_sounds_app_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xanikadir/9giH7hc/gabriel_s_oboe_organ_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/ejhjib3/read_music_notes_game.pdfIn PDF document text
    • http://chistohome.moscow/vomarelitolepuxus5rfg.pdfIn PDF document text
    • http://gta-msk.ru/marifosidordlyb.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/mKW2ija/pandemic_deck_tracker.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/djj0CwX/wugiku.pdfIn PDF document text
    • https://komamizidunip.weebly.com/uploads/1/3/1/4/131437982/pukajo.pdfIn PDF document text
    • http://pearhaidhr.fun/calendar_template_ms_word_2013kryff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4c80ca50-31de-4e6f-b265-471620011c4a.filesusr.com/ugd/08c6b7_87d8312bcf6b4e0795cfcf351a551dba.pdf?index=trueIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_3cab18124bab4b2181626ae59d2c312e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50d2022-0e9b-4551-b0a8-e7d0c031abcf/breaking_dawn_book_cover.pdfIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_922a66673e92438798eff21d62cc815b.pdf?index=trueIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_67cd1b9fb52a43ce817018ee0912ada3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bae7d42-1532-48f1-8eb9-35c9d8993282/ged_math_sample_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b27d96-d3de-4277-9ebc-bb7beedfe4e3/how_to_know_if_you_have_acne_or_just_spots.pdfIn PDF document text
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_537ff6ff339e4655966f4c403e43b4bf.pdf?index=trueIn 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_off0000dcdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDD 5496 bytes
SHA-256: 2f0ff82abe8f3294ff4be776bbd89e16c81f7d7928b0615a4b5b7842a564ea11
font_01_sfnt_off0000ef6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6F 11972 bytes
SHA-256: bfa053c43976165f141bf3395acd19da358abffcac1ee408fdc09428f3d76bbb