Malicious PDF — malware analysis report

Static analysis result for SHA-256 9621244abfccdadb…

MALICIOUS

PDF

78.3 KB Created: 2021-03-01 02:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7288e4448b2009d9f9aad21eb572ca43 SHA-1: 5abc8185537f72274817e837b14c7f2fe69a6dbb SHA-256: 9621244abfccdadb2b3b21197981bd9fdb685052443a5dabadeee127a0fbf474
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://xajibur.ru/strik?utm_term=how+to+get+procreate+for+free+on+tablet PDF link annotation
    • http://dhl-order.info/alvaro_soler_volarwjw9w.pdfIn PDF document text
    • https://vatipasa.weebly.com/uploads/1/3/0/7/130775610/cfe01d8f473eeda.pdfIn PDF document text
    • http://getdouche.xyz/what_do_card_suits_represent5l4rq.pdfIn PDF document text
    • http://dk-inc.xyz/6213348466sz8ju.pdfIn PDF document text
    • https://sizeduxaginota.weebly.com/uploads/1/3/2/7/132712537/2429fc85abd50b.pdfIn PDF document text
    • http://mini-cam-v2.club/arthritis_research_uk_neck_painndu90.pdfIn PDF document text
    • http://characduwe.space/timeline_diagram_template_wordec5xl.pdfIn PDF document text
    • http://meblik.su/how_long_has_the_magna_carta_been_in_useseolt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374542/normal_5fe9b29a102cd.pdfIn PDF document text
    • https://netexebi.weebly.com/uploads/1/3/0/8/130815192/8580597.pdfIn PDF document text
    • https://tojuxumisadef.weebly.com/uploads/1/3/4/7/134714483/45a88e53b162b.pdfIn PDF document text
    • http://itclick.pro/mit_app_inventor_download_iosd8zyi.pdfIn PDF document text
    • https://mosazipabefo.weebly.com/uploads/1/3/4/7/134735261/7768024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474475/normal_601a10c15e41a.pdfIn PDF document text
    • http://comp-arenda.site/factoring_quadratic_equations_worksheetis512.pdfIn PDF document text
    • https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/5030984.pdfIn PDF document text
    • http://copyrightsupport-ig.com/zibasolabamadokipi4ypve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455901/normal_5febd053f3df9.pdfIn PDF document text
    • http://francobusiness.com/11178423601aejk1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55E 5196 bytes
SHA-256: 061839b6a015e768b0e5eed74a3b48b9e28a2eab06e2fcfc3577ee2bb7167cbc
font_01_sfnt_off00010739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10739 10796 bytes
SHA-256: 4f8fd7bc220baf356db2d313db97a0d66a40544cf80a853bece615521a623a94

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