Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f46514340aafe39…

MALICIOUS

PDF

85.2 KB Created: 2021-09-01 07:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8ae0ef083d7f9dbeb3b0a80ac36d6dd8 SHA-1: 2bd134daa56e4d9160b7ca29b1562b97f4166f39 SHA-256: 5f46514340aafe3948e6a9016a361a9ebba52c9c38ba1315bd84147bf3ddefe9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The presence of these links suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075807c48a90---5911137003.pdf In PDF document text
    • https://sharjahcements.com/images/bulk_images/files/kizapawe.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/28483464675.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/23675148235.pdfIn PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/reton.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb555cdd9e---kukaligapide.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/9913f52b12711a9bb042ae4057663bdf/pajarofusidanepamere.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/5066539082.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/93642891624.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/vilugozituweket.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/b65uusag1u8d0hu59s5dpgf831/22749060809.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/refu4bd2p5vqf0ikdrn87f5vc1/tanolurozanekosekuxabut.pdfIn PDF document text
    • https://le27.fr/docs/file/paniwukoragifobuda.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/b0d7ed89dba1827176384a327c4f9d9a/62813383014.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/an7ch4j4hvr8kgc799ol8cske5/405776188.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/zudizomesefupojatajos.pdfIn PDF document text
    • http://kfbi.ru/content/file/wijijovonuvebagelu.pdfIn PDF document text
    • https://gkatsov.com/userfiles/file/juzowizibukoravasoxag.pdfIn PDF document text
    • http://bangkoksolarpower.com/syner_upload/images/files/68060644958.pdfIn PDF document text
    • http://indecomavo.pl/inc/wudirarimanamepevexej.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/8a52cdd66e50503df378b5365e762ad1/gijakenosowazefuraw.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/refagubavosalogazubo.pdfPDF link annotation
    • https://chp-travel.ir/data/file/82273124580.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160713b6016e6d---kagirojoratebukusi.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/tanaruzulunizoj.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/82960155806.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=same+day+dress+alterations+near+mePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE842 17624 bytes
SHA-256: 491e1b5e2556434927a9e57a460d251cb03a2624e2a833dc1ab0fa20a127cc5f
font_01_sfnt_off000115d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D3 10596 bytes
SHA-256: 5394aa92fa4e1e5271a1732c92567c6b3c3e1613dc6750456140c7d68e094760
font_02_sfnt_off00012dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1