Malicious PDF — malware analysis report

Static analysis result for SHA-256 6314e32ddc7fb8d8…

MALICIOUS

PDF

84.9 KB Created: 2021-03-28 20:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a41404a8e27296288f52501ef0baa954 SHA-1: d3738c59f6d597b13448084329b3c2369b2d2571 SHA-256: 6314e32ddc7fb8d87916e319e0196eaa266d8283bb93308939829dfd2f749eed
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains multiple heuristics indicating malicious intent, including a link farm, a payment redirection lure, and ClamAV detection as a phishing trojan. The embedded URL `https://ponafet.ru/wix?keyword=download+fly+gps+apk` suggests the document is designed to trick users into downloading an Android application, likely malicious. The presence of numerous external links, some benign and some unknown, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/wix?keyword=download+fly+gps+apk
    • https://cdn.sqhk.co/teforoke/dxX0hiJ/notification_ringtone_download_pagalworld.pdf
    • https://cdn.sqhk.co/tagubutapa/cVgeRje/62417048467.pdf
    • https://cdn.sqhk.co/kupejabel/iaieUhh/rollerball_pens_for_sale.pdf
    • https://cdn.sqhk.co/dojidavos/m1iagg9/ruderegu.pdf
    • https://cdn.sqhk.co/fesakesovoka/A0MZhb5/b._o._t._a._tarot_deck_for_sale.pdf
    • https://cdn.sqhk.co/gusiloxi/ejageau/screen_recorder_with_system_sound_recording.pdf
    • https://cdn.sqhk.co/xejudawadoni/qugclhc/xarutigoj.pdf
    • https://cdn.sqhk.co/rabovafom/2hcXGxE/what_colors_go_good_with_red_and_gold.pdf
    • https://cdn.sqhk.co/bofotabi/igArUhb/44524369172.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6b21c484-99f8-4e97-b77a-b77c054bfe5d.filesusr.com/ugd/f139d4_0a9b829388ab4e3aab43be7d65b99d1a.pdf?index=true
    • https://s3.amazonaws.com/wemupajese/free_templates_for_website_bootstrap.pdf
    • https://uploads.strikinglycdn.com/files/34fa2862-bd16-4ca4-b42e-0de257a12c15/10943862819.pdf
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_5309ce517e884f179f3cf03a8c416bfe.pdf?index=true
    • https://uploads.strikinglycdn.com/files/be8b009b-ec28-4173-9d79-07ae24d55dc9/how_to_find_angles_of_isosceles_triangle.pdf
    • https://s3.amazonaws.com/pogolo/alchemy_classic_game_mod_apk.pdf
    • https://s3.amazonaws.com/senodiw/jikotumifit.pdf
    • https://uploads.strikinglycdn.com/files/ad698010-c5a6-4981-bb95-5a5bc8cea00d/nadirokitewulever.pdf
    • https://s3.amazonaws.com/kozewuposoridil/lenovo_t430_weight_kg.pdf
    • https://uploads.strikinglycdn.com/files/187eba98-ad62-4358-950f-1ddb9b081ff9/precision_sewing_machine_vintage.pdf
    • https://uploads.strikinglycdn.com/files/dd28aab2-5af0-4ae1-917c-9c5dca4904bd/grocery_price_comparison_spreadsheet_template.pdf
    • https://uploads.strikinglycdn.com/files/d1bab103-a227-4934-805f-9856384dd0ea/87876376562.pdf
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_38c14600b3a54a569ed8c0be6523b952.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f36f6a46-8e28-42a0-95a0-ff5a4546b257/87296514815.pdf
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_a1e890bb76a24a83ae17a6e1ef44af25.pdf?index=true
    • https://uploads.strikinglycdn.com/files/94494bdc-af44-4f4f-9043-a16bac3ad102/30698273330.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecdf.bin
b28f93423a56d8c88ba90bf2f0d8119c0ddd81f5ab633879923f4baa05fcd387
pdf-font-stream PDF embedded font (sfnt) at offset 0xECDF 5372 bytes
font_01_sfnt_off0000ff5e.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5E 1800 bytes
font_02_sfnt_off000107ec.bin
057bc4b96a52be90e8fa665b37a583abd8c9ae975ba77c7cbf7e54babdd43004
pdf-font-stream PDF embedded font (sfnt) at offset 0x107EC 11128 bytes
font_03_sfnt_off00012df8.bin
864fb798b0b4617589ddf1d76f404352b0cedc9e057578586dbff024744a9b66
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF8 16372 bytes