Malicious PDF — malware analysis report

Static analysis result for SHA-256 38997e4e8c7a5769…

MALICIOUS

PDF

91.1 KB Created: 2021-04-24 01:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a403bebd132f713997ac432de595b5fb SHA-1: 2016af0c295f1d2dc1f80064f9757556df96999b SHA-256: 38997e4e8c7a5769d012d3871e8c178781667d870408afcdba6b73ede87ac825
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to seemingly random PDF files, indicating a potential link farm or SEO manipulation tactic. The primary malicious URL identified is dugedepap.ru, which is likely used to host a phishing page or download further malware. ClamAV and ML classifiers also strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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/strik?utm_term=reasons+to+stay+alive+summary PDF link annotation
    • https://kutemipemowu.weebly.com/uploads/1/3/4/8/134860595/kanobakimuxo.pdfIn PDF document text
    • http://vofufime.mypressonline.com/bosch_300_series_ventless_washer_and_dryer.pdfIn PDF document text
    • http://warewakeb.sportsontheweb.net/tom_clancys_the_division_2_gameplay_single_player.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/how_to_set_up_bowflex_ultimate_2.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/8849632132.pdfIn PDF document text
    • http://sizerasadaxer.mywebcommunity.org/public_relations_n5_book.pdfIn PDF document text
    • http://xitawefavam.medianewsonline.com/apicultura_en_ecuador.pdfIn PDF document text
    • https://sokuvefababadax.weebly.com/uploads/1/3/1/8/131856373/4714963.pdfIn PDF document text
    • https://woxukobu.weebly.com/uploads/1/3/4/3/134392577/94061a3af9.pdfIn PDF document text
    • https://nokesopupikes.weebly.com/uploads/1/3/4/7/134767934/xijuwakuzivi.pdfIn PDF document text
    • https://zodosibuje.weebly.com/uploads/1/3/1/0/131070625/2c499a3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gosete/arithmetic_sequence_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/57806503378.pdfIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_2603854c2ecd4a0ebcb8a3160c19c811.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/bams_am_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/dexes.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_987f19e3bf3141ecb355bf69268bed7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/doble_exposicion_beatriz_colomina.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/penup.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/message_in_a_bottle_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/caa_membership_number_format.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/pitozibogitiv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A62 4884 bytes
SHA-256: 1df0e8e34b4e1324a0e532d273a5d992bec689d01439d65e1d31faa34ae87ba0
font_01_sfnt_off00012aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEB 11116 bytes
SHA-256: 99dc53dfe6d53511cd6c71e374723ebcff2b98afd7df2f25e14fa3a0b06b53b2
font_02_sfnt_off000150a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150A7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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