Malicious PDF — malware analysis report

Static analysis result for SHA-256 64649e9ecb14fea6…

MALICIOUS

PDF

70.4 KB Created: 2021-03-19 16:08:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6ed24f04b6bb18554673ee20784e90e6 SHA-1: 125aed72472edcd47cc6597dd24b8714736924c8 SHA-256: 64649e9ecb14fea69a8c42d7fff2e7f9ac40aa9a74cf91071fec6cef23648ff0
186 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. 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 0.9996

Heuristics 6

  • 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.
  • 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://lozipotod.ru/strik?utm_term=graco+snugride+click+connect+30+travel+system PDF link annotation
    • https://pazaduzot.weebly.com/uploads/1/3/4/4/134473777/8543616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421966/normal_5fd79664da2ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456728/normal_603b62dadeea9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427300/normal_600498675ab19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445338/normal_5fefc2b5da2ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379482/normal_6051bd36ac808.pdfIn PDF document text
    • https://pupifino.weebly.com/uploads/1/3/0/7/130776741/sokulenezubuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_603fc8bc7ad26.pdfIn PDF document text
    • https://wibipujesotut.weebly.com/uploads/1/3/1/3/131398272/1938735.pdfIn PDF document text
    • https://gomepenet.weebly.com/uploads/1/3/0/8/130874128/tunupodavure_motisa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_602ae78db2581.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372073/normal_5ff2fdc302fd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jinabisura/wpf_templatebinding_default_value.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/20204880633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6086450-a007-4485-bafe-38375ffe39fb/fluke_intellitone_pro_200_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6ac4f5-8691-4e60-908a-017b81aa1e6c/6658105779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c379d0f-e7ff-46f6-894a-9ecf70571d41/us_navy_how_to_fall_asleep_in_2_minutes.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/biconic_headphones_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/66567614666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aeb2c98-d7af-405e-a211-801b9f06ec50/are_sodastream_co2_canisters_recyclable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4f52cb-180b-46e2-9c7c-55590d03bb75/canon_rebel_t5_sensor_size.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/18414935530.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_off0000d4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EE 5820 bytes
SHA-256: 6c344614c0b55179821bbd57db62b3323c57a7dd3ad24ecbab75749e3c215646
font_01_sfnt_off0000e8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B8 10340 bytes
SHA-256: 733558f486ba85a7c375952d462fa4d49a59895c71620895dfdbcb873445b60b