Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cf341a248ee71c…

MALICIOUS

PDF

84.2 KB Created: 2021-03-18 08:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1177f76f36c1d62f456a69f2226e9347 SHA-1: 24b39db3b407d7e46e26ae4af53471d0ecb90ace SHA-256: 80cf341a248ee71cc9b6be78e7685fdf94cc7ce12d1f2d1c8f04e044ae880384
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs point to various PDF documents, potentially serving as lures or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 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.
  • 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://soxebez.ru/strik?utm_term=what+type+of+heater+is+best+for+a+garage PDF link annotation
    • https://diwimiwiwomenen.weebly.com/uploads/1/3/0/9/130969795/wunudakipizune.pdfIn PDF document text
    • https://detaxotipag.weebly.com/uploads/1/3/4/7/134730838/46aefff49c272e.pdfIn PDF document text
    • http://gawewatejunowib.iblogger.org/toyota_recall_case_study.pdfIn PDF document text
    • https://degijidugaf.weebly.com/uploads/1/3/4/8/134886203/1192849.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500679/normal_5fcc0c0fdb038.pdfIn PDF document text
    • https://furimubabo.weebly.com/uploads/1/3/1/8/131856330/5674307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_5fd8f85bb175e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465000/normal_5ffebdf018c56.pdfIn PDF document text
    • http://xutuxul.22web.org/klasifikasi_aspergillus_sp.pdfIn PDF document text
    • https://ruworelolovifuf.weebly.com/uploads/1/3/4/4/134462917/lagasijexekamijerexu.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/75518836576.pdfIn PDF document text
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/7449003.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/2725732.pdfIn PDF document text
    • https://katexiru.weebly.com/uploads/1/3/4/5/134576370/zokegi.pdfIn PDF document text
    • http://sevibifodome.getenjoyment.net/char_griller_duo_gas_and_charcoal_grill_reviews.pdfIn PDF document text
    • https://wiwovadale.weebly.com/uploads/1/3/5/3/135322143/netaredogi_pesoxubutufadi_texofir_tefadejaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://netawuwimirixor.onlinewebshop.net/internet_of_things_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35bb5fdf-d8d2-4501-86cc-0d515c9918a2/how_to_say_weather_the_storm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7536b63e-292a-43d4-8a2c-9dbd396d5f54/4827736387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c62d02dc-d33a-451c-9afe-2852d4682373/old_school_runescape_boss_hiscores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5831480f-a491-4dc2-bccb-58366e195e26/g_shock_mud_resist_triple_sensor_multiband_6_tough_solar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40157648-dcf5-46ad-b086-2ceafefdb2c0/36336668884.pdfIn PDF document text
    • http://zimopup.myartsonline.com/dezulagexowunagoduna.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4B 5384 bytes
SHA-256: f3e4122d1ff5b8f72b29b7fa358b45b829783a605e2a07a1f0321e939169f1c7
font_01_sfnt_off00011eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB2 10716 bytes
SHA-256: 2ef986af49dd28d13b4b719a61ee6766da7d653b272d1d53d0858558f6ea20e0