Malicious PDF — malware analysis report

Static analysis result for SHA-256 3075cddff46d3138…

MALICIOUS

PDF

80.8 KB Created: 2021-05-05 11:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 78a8c50ae9c70cf1d7b32ca8aac96c9b SHA-1: 7c6fcfaeff90bee3023b31a1b5b8b61b278000ae SHA-256: 3075cddff46d3138a3e3961377d8efb9998ed3b1d02c07c0e0ef0971eab6da22
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://resalured.ru/strik?utm_term=pit+bikes+for+sale+uk+125cc PDF link annotation
    • https://raxuzorozejataw.weebly.com/uploads/1/3/4/0/134042373/5308625.pdfIn PDF document text
    • http://medyayazilimtr.com/83771795105yv45i.pdfIn PDF document text
    • http://organicnu.info/a_touch_of_class_5euatkf.pdfIn PDF document text
    • http://svoytrylend.xyz/673564215093infv.pdfIn PDF document text
    • http://tramlaweq.online/65643690999sly3j.pdfIn PDF document text
    • http://online-bestshop.xyz/474249928050ed75.pdfIn PDF document text
    • http://paksorond.xyz/cqc_inspection_reports_domiciliary_carenfs0n.pdfIn PDF document text
    • https://xisifogobodi.weebly.com/uploads/1/3/4/7/134735845/5dc54221fc3.pdfIn PDF document text
    • http://belldiscount.ru/why_does_my_onkyo_receiver_have_no_sound72sjd.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/podewizupelumu-zamolaz-fametedelete-neratusedulul.pdfIn PDF document text
    • http://womaruzufoxila.iblogger.org/xonemexaluj.pdfIn PDF document text
    • http://cucoupon.info/letter_formation_sheet_cursive7rhm7.pdfIn PDF document text
    • http://prequester.online/1799365366zljih.pdfIn PDF document text
    • https://jurutidi.weebly.com/uploads/1/3/5/3/135397820/9140025.pdfIn PDF document text
    • http://berimigigo.22web.org/98448626703.pdfIn PDF document text
    • http://all-system7.xyz/1734-ie4c_channel_faultesxmt.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://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_dcbb845a128f42938708e030a2a19b95.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kuboki/16374883718.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_6060f4c21f4f444c88476961989c00a1.pdf?index=trueIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_929989c2d0f64fc0b7fcbff665aa9be0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gumagabu/vuwetimagilevawev.pdfIn PDF document text
    • http://vesevujivodekut.epizy.com/vetipadazuvakivogigos.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/belling_electric_range_cooker_manual.pdfIn PDF document text
    • http://jelalesixavab.epizy.com/what_factors_influence_ethical_behavior.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_off0000f142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 5164 bytes
SHA-256: 336d7432a1aea29964eed7114cab2b4e086accb5b96657c098bd9a4d44d5f0f8
font_01_sfnt_off000102ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EC 10772 bytes
SHA-256: 0ebda6e3d3eb86188eefc004f8f1004cbccaf6ea27470010a77deba4df3ea33d
font_02_sfnt_off00012780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12780 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333