Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f57431b99b940e…

MALICIOUS

PDF

86.0 KB Created: 2021-08-04 01:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 974f10e480a530540aad61c1d4d6d9a8 SHA-1: ed8b8eee1ee6e0083fa8032aac3c8d712e3a5120 SHA-256: b2f57431b99b940e8cfb1f7f864601212a15b928f47fb05542bbdcbfe83c9e27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of link farms suggests an attempt to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/720862d2f8c80cd1a57db1dc3b9e0569/73484655146.pdf In PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16079c940a0c75---kaxevuvo.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/450d305d1d49d3fd5ba4f1fea1f3c078/wurelivasug.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/kazokezef.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/68671588565.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/75900866292.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f63857b5e---nigamijajowumitojutugid.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/45477644250.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/43693049801.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/kozufunejimo.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/jedamenizagib.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/tifomewebipozasa.pdfIn PDF document text
    • http://uctodane.cz/UserFiles/File/jekivugaxuvimaruwubovad.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/67691366016.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/49831ae06d00c791e008237762d6c886/2964639203.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/rasofiduzixuxojuxezebobe.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/030622216598.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/34372485377.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210512125407.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/rilarobetodani.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608294f8c7ee9---giwikisaza.pdfIn PDF document text
    • http://boisehighclassof1965.com/clients/879780/File/70534383638.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a753d64a338---1927748368.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=blanka+lipi%C5%84ska+365+dni+pdf+chomikujPDF 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_off0000e7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDD 11528 bytes
SHA-256: 7410b7b6015673fc609e45ccb2a31e8255bb5808e3a95a1bdea2ca7c6124f7f5
font_02_sfnt_off00011aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABA 18048 bytes
SHA-256: abd5a8d6184d9d936939c615f44774657dfb48d1f8c7770b59813815c699f6e3

Open this report in the interactive analyzer, or submit your own file for analysis.