Malicious PDF — malware analysis report

Static analysis result for SHA-256 8471d46140a8ab05…

MALICIOUS

PDF

89.8 KB Created: 2021-06-05 13:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5de9a7d813805bdc6ab348fb0f2f4e61 SHA-1: 415cfa42b69738ddf2059fc18bf85b069ef78db6 SHA-256: 8471d46140a8ab05108ee70413dff6858da8ae1b4ec4046e2a499be48f140714
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to attract traffic. The presence of a 'crash bandicoot 3 pc emulator download' UTM term indicates a lure for potentially unwanted or malicious software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nomylo.ru/pbw?utm_term=crash+bandicoot+3+pc+emulator+download PDF link annotation
    • https://wupibivuvofat.weebly.com/uploads/1/3/1/1/131164023/pipofutubikaja.pdfIn PDF document text
    • https://verefatodefi.weebly.com/uploads/1/3/4/7/134722939/motoxiku.pdfIn PDF document text
    • https://lubumona.weebly.com/uploads/1/3/4/6/134648672/lipijajulilor-laxofenen-legavakag-fuvaved.pdfIn PDF document text
    • https://xitirume.weebly.com/uploads/1/3/4/3/134392652/7592034.pdfIn PDF document text
    • https://tepukijamuboze.weebly.com/uploads/1/3/5/3/135301813/zedimu_vixuterokonav.pdfIn PDF document text
    • https://mubagaluzab.weebly.com/uploads/1/3/4/8/134874300/dijegiberonem.pdfIn PDF document text
    • https://tufefuru.weebly.com/uploads/1/3/4/6/134621659/puwidadokuguwabux.pdfIn PDF document text
    • https://kijapipova.weebly.com/uploads/1/3/1/4/131407887/dd01b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472506/normal_5ffdf4bf1b67b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455208/normal_5fdbe5c5ce9df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384472/normal_6067be014c187.pdfIn PDF document text
    • https://dirifanijademad.weebly.com/uploads/1/3/4/8/134898971/todamez_busitilatek_mawejixod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425237/normal_6058ffaeb4825.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/778fdf5e-5a6a-4ea1-b052-04e497003e97/steel_magnolias_script_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/598de134-48c8-4400-b41d-1ed712d214c3/84898496548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a3ec199-4f88-4dc3-b528-70ccc0ff9cac/fetiwowezixibitej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e95cc6e-1a9e-423f-ab90-7162ef674cfa/better_than_meaning_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2686543b-4ea3-45f5-ba32-301964312620/joy_luck_club_a_pair_of_tickets_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd78079-f892-48fc-9926-6e0d867cfb94/best_songs_70s_80s_90s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb91874-2acb-4b20-99ab-74f96de6fd70/libro_nociones_de_derecho_positivo_mexicano_ricardo_soto_perez_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f5333f4-d1b4-465a-ac34-12e300900eb2/how_to_setup_tp_link_extender_ac1750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d738471-2e9a-4af6-b34a-13219e9447fb/14785144738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d16037-f7f8-4df9-b879-983dba1c03c9/define_multiple_causation.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAF 5612 bytes
SHA-256: a798673a5f6fbb5a5fc4df3b94bb276e22b701b762807e7f5b178542c40c27c6
font_01_sfnt_off00011e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9D 11292 bytes
SHA-256: 9a42d538c9314946cd2cedf073aee026d71c5368feeeb978427ff3d817cce2f5
font_02_sfnt_off00014440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14440 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15