Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5032e27300778c9…

MALICIOUS

PDF

76.6 KB Created: 2021-03-20 00:31:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 32c3db70a9b0d712466ed3abed4f351f SHA-1: b712a92575680911933bc239593dd036caa10c0a SHA-256: e5032e27300778c97b5aa3eb4cbdbfd9c9e2a350eac2f9115ab878e9a7890606
154 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 and an invoice-themed 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 0.9991

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jottigo.ru/strik?utm_term=symbol+scanner+enter+after+scan+ds9208 PDF link annotation
    • http://erethiztzj.space/minister_license_requirements_in_missouripvdr0.pdfIn PDF document text
    • https://cdn.sqhk.co/tifapoxur/ijjWRha/soundcloud_repost_channels.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/hx_stomp_update0c4vr.pdfIn PDF document text
    • https://nesupopokajore.weebly.com/uploads/1/3/5/3/135394324/kigafojukaxeva.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/ljhhgh1/doomsday_survival_kit_costco.pdfIn PDF document text
    • http://phtech.site/45499958549mfgtc.pdfIn PDF document text
    • https://zunaxilofeten.weebly.com/uploads/1/3/4/6/134688144/1501edad675c.pdfIn PDF document text
    • https://cdn.sqhk.co/kelarega/fcngchg/22289316983.pdfIn PDF document text
    • http://socialwave.me/o_que_fazer_aps_terminar_um_relacionamentog3svr.pdfIn PDF document text
    • http://memubalejegezur.66ghz.com/android_studio_installation_steps_in_windows_8.pdfIn PDF document text
    • https://nimifitirujaga.weebly.com/uploads/1/3/4/6/134693460/7006421.pdfIn PDF document text
    • http://amorexpo.com/2397925555dckr5.pdfIn PDF document text
    • http://vas-rem.ru/remote_sensing_of_environment_jensendgqif.pdfIn PDF document text
    • http://covid-19online.site/wiladunaridumewitot562.pdfIn PDF document text
    • https://cdn.sqhk.co/jagavibejabe/gchiUTA/14401202175.pdfIn PDF document text
    • https://gavurefeg.weebly.com/uploads/1/3/1/0/131070452/tapanabad_votovot_kutefosawadus_norakudawinam.pdfIn PDF document text
    • http://invitesistem.ru/do_you_love_lyricsq0c9f.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/wewiro/58200422840.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/bescom_bill_payment_receipt.pdfIn PDF document text
    • http://xuvemotoguno.epizy.com/rubimegabitesekij.pdfIn PDF document text
    • http://gujodupilewibo.epizy.com/doro_mobile_phone_covers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/762568361.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/technic_launcher_minecraft_pirata.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_off0000db99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB99 5876 bytes
SHA-256: dd857d1e826f91c68ce541cc3e51df8a276d4b9166bcf59916724ff52d0c0602
font_01_sfnt_off0000ef6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6B 11036 bytes
SHA-256: 2866b25e01260f463657bbe319b03e0836f4f2444a4c7264c62846058e513b43
font_02_sfnt_off000114cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3