Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4663f18c037bffb…

MALICIOUS

PDF

80.4 KB Created: 2021-05-10 23:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f92dcceaa3caa0a84d6fbfb9a06444c5 SHA-1: b5600504fed877e8884e1f389ba7bb0226570d53 SHA-256: e4663f18c037bffb97f850b0e11e0ff3e965be3657530be5ade67d505d0e5179
196 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is part of an advance-fee scam, presenting lottery or prize language alongside parcel delivery requirements. It also contains a large number of external links, many of which point to PDF files, suggesting a link farm or SEO manipulation tactic. The embedded URLs and the nature of the heuristics strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://dafemum.ru/strik?utm_term=how+to+write+about+a+quote
    • http://mikrotikwizard.com/bufapajex7f0y.pdf
    • https://nonesuwenuvav.weebly.com/uploads/1/3/4/4/134400251/tesug.pdf
    • http://mybestchan.online/dell_inspiron_n5010_i3_320gb_3gb_ram_price_in_indiayl7wk.pdf
    • http://reduslim-ufficiale.website/ruxogerolikodoxomakowof8h0i4.pdf
    • http://demask.fun/28913661977vparc.pdf
    • https://cdn-cms.f-static.net/uploads/4408593/normal_601c95a6dc00c.pdf
    • https://static.s123-cdn-static.com/uploads/4453914/normal_5fccb31552b6a.pdf
    • https://static.s123-cdn-static.com/uploads/4413013/normal_5fc856e1f089e.pdf
    • https://supagerafigi.weebly.com/uploads/1/3/0/8/130874211/vigezejokuvogusiwiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/daraniwekamidir/hip_hop_dance_choreography_videos.pdf
    • https://s3.amazonaws.com/regovadeje/bakugan_battle_planet_game_apk.pdf
    • https://s3.amazonaws.com/ropidadegaxut/33005588938.pdf
    • https://s3.amazonaws.com/kesumasaka/23252433413.pdf
    • https://s3.amazonaws.com/nelizenejakarug/75726268656.pdf
    • https://s3.amazonaws.com/xamibebulosaxug/gradual_alarm_clock_android_app.pdf
    • https://s3.amazonaws.com/kujapomib/feasibility_report_construction_site.pdf
    • https://s3.amazonaws.com/mupukesunobaga/call_of_duty_mw3_android.pdf
    • https://s3.amazonaws.com/vabedafozo/kibepis.pdf
    • https://s3.amazonaws.com/lemerisinivum/is_the_yellow_birds_based_on_a_true_story.pdf
    • https://s3.amazonaws.com/muwemivumazulax/is_tesla_the_first_electric_car.pdf
    • https://s3.amazonaws.com/nuselufuzo/gezumazalozoxan.pdf
    • https://s3.amazonaws.com/lejivugeleguwod/john_lewis_egyptian_cotton_sheets_sale.pdf
    • https://s3.amazonaws.com/widiku/tinesukuwomevezoj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff33.bin
c69fc31f70f8aa6a59be0b58324b32c7526243bd6978bc449804c7e6afbff1fb
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF33 4788 bytes
font_01_sfnt_off00010f9d.bin
3956c2d4a8a450be35ca720087644043994e924ddd448ffcbeda568e5197685a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9D 10756 bytes