Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01bff34d4cd95af…

MALICIOUS

PDF

95.3 KB Created: 2021-05-22 12:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 13b746a76664d0a31a036b73ca42d2d3 SHA-1: 17fff4dd012bb05846aaa3bb169f9685bbd5c7ca SHA-256: e01bff34d4cd95aff4e42ffff59da8f5a0fa41d2df013a7f32a4d193c51b4a54
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://mezovuduw.ru/strik?utm_term=why+is+my+power+bank+not+charging+my+phone PDF link annotation
    • https://pidesetax.weebly.com/uploads/1/3/0/7/130739971/rupow_kuxidufipedi_matukevimabut.pdfIn PDF document text
    • https://lujovimujesami.weebly.com/uploads/1/3/4/0/134019161/noseziv.pdfIn PDF document text
    • https://dajemegexiri.weebly.com/uploads/1/3/4/4/134492390/dowog-zabupor-falepin.pdfIn PDF document text
    • https://lepimezuraz.weebly.com/uploads/1/3/4/5/134599896/807a3a697793dd.pdfIn PDF document text
    • https://fixuvanexe.weebly.com/uploads/1/3/4/3/134359444/3180788.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/3245092.pdfIn PDF document text
    • https://sokowerifali.weebly.com/uploads/1/3/6/0/136053586/pisalafiwalisum.pdfIn PDF document text
    • https://lirurofimel.weebly.com/uploads/1/3/6/0/136088330/zekusovulemobi.pdfIn PDF document text
    • https://kiragidemi.weebly.com/uploads/1/3/0/7/130775435/bekigow.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/4485233.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/mujevubutukoxu/los_juegos_del_hambre_en_llamas_pelicula_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e346322-0a70-4fbc-9fe5-0271a084d2dc/dewalt_20v_drill_at_lowes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5fc451f-2809-4bec-ac9e-9d34c96b41c5/tedof.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/salipalunikinagabarowade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5d51c5f-2524-454d-87a8-06d4bc457df6/pumoxoninofurewet.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/list_all_sheet_names_in_excel_vba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe77bb9-71bc-4653-a837-9bd1d50cc7ba/sowabusij.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/nepopinevo.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/real_bitcoin_miner_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/35036003887.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001014b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014B 3220 bytes
SHA-256: c42916a939bd9a3a2e3ccf9bc12debc2e09e368f987c1ddc30b1bbf6f6a0fdc2
font_01_sfnt_off00010cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC4 5516 bytes
SHA-256: 96c24755aabdd5829b804f892425b638467eaa425fe9a1a6a2040a3cd58187d1
font_02_sfnt_off00011f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6B 11056 bytes
SHA-256: e46ecf7d9dc7414f407d4356477880f28aa6a123403ea7434541e8897fc3e68c
font_03_sfnt_off000144f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144F4 17508 bytes
SHA-256: e07eba1d40df8844d259d5a454879eade8387d030b078b39959a21eadca97e8d
font_04_sfnt_off00015ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ED3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2