Malicious PDF — malware analysis report

Static analysis result for SHA-256 48df58e38a59055c…

MALICIOUS

PDF

77.2 KB Created: 2020-11-30 09:25:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 209ed06fd05c0357230f8fd605cb69c5 SHA-1: 91f5b46668e6b87a66a0b7e30a3368ec0d63f327 SHA-256: 48df58e38a59055c9688bdac474baa810027d1274c25f7e7b0f6840b72ca2185
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://trafftec.ru/123?utm_term=raspberry+pi+mame+arcade+kit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470399/normal_5fc45e8d485aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466679/normal_5fb6233b6af9d.pdfIn PDF document text
    • https://deximuxinudob.weebly.com/uploads/1/3/0/7/130739142/lusojaverotemukowo.pdfIn PDF document text
    • https://nosozekime.weebly.com/uploads/1/3/4/6/134634018/pesed_puridagixam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8995a8a40dd.pdfIn PDF document text
    • https://nedudefo.weebly.com/uploads/1/3/4/3/134389218/zimisosixa_lapedew_zazexe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401972/normal_5fb457db108e2.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/nixotixus_dedomevinuli_zasaposokenuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5f9c0f2cf23e2.pdfIn PDF document text
    • https://patelevenimo.weebly.com/uploads/1/3/1/4/131437444/xuzamovuw.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://uploads.strikinglycdn.com/files/2ce9211f-db3c-498f-8e86-4561117d6ee0/56841393227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b322eb-f901-447d-9301-9242e52123ef/psychology_themes_and_variations_10th_edition_chapter_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a772dfe8-e017-4137-a1fb-c6ca9f8d8c00/57374829034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ffcb63-0f5c-46a1-9b4c-342258c51e2d/big_trouble_in_little_china_sunglasses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cedc2bd-521a-4cdd-9026-bbe70dee413e/bugup.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE532 5072 bytes
SHA-256: 7fb08deb5667f74a5bc908d48e3a4c0954a7762dd6c4652f6c12ccf91b4aa7c5
font_01_sfnt_off0000f67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67A 10200 bytes
SHA-256: 4410377be532f94caf3dd275d6996ce62dad063effb45b25749e8bdefb4deeed
font_02_sfnt_off00011975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11975 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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