Malicious PDF — malware analysis report

Static analysis result for SHA-256 56badb766f30db60…

MALICIOUS

PDF

80.0 KB Created: 2021-05-31 20:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24271e63ab764af29595568e8ce04813 SHA-1: 4042f31c265946ce304fe72e9e8823e028278662 SHA-256: 56badb766f30db60ecc4c423b3df200d61129366c8fec5c9d0960490e3da7938
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs and the nature of the link farm point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=cisco+packet+tracer+student+mac
    • https://gufagopa.weebly.com/uploads/1/3/4/6/134660265/gonep_bofeku_lupoxok_fosiluritifated.pdf
    • https://lorafapewokaxan.weebly.com/uploads/1/3/5/3/135342596/jekirate-kuxivulibi.pdf
    • https://sarutofujatazix.weebly.com/uploads/1/3/4/5/134584212/gokusotato_tupugupawisijig_kikanatafower_lamugexuwaxeb.pdf
    • https://xusemiwo.weebly.com/uploads/1/3/4/8/134899199/2781329.pdf
    • https://degodowaserujes.weebly.com/uploads/1/3/4/4/134494515/6f48380.pdf
    • https://cdn-cms.f-static.net/uploads/4413236/normal_6047913a98551.pdf
    • https://rijumiwotoresu.weebly.com/uploads/1/3/4/4/134490354/zigizegadixinoj.pdf
    • https://luzurojavozajin.weebly.com/uploads/1/3/6/0/136090511/4803315.pdf
    • https://weziriditovi.weebly.com/uploads/1/3/4/1/134108838/sikevujeserikim_nuzadaraguxopu.pdf
    • https://xitititoludazo.weebly.com/uploads/1/3/5/9/135987602/6ddea4.pdf
    • https://porujigiwafixuf.weebly.com/uploads/1/3/4/3/134373975/tunazetewar.pdf
    • https://kotasixunepa.weebly.com/uploads/1/3/0/7/130776076/6396601.pdf
    • https://cdn-cms.f-static.net/uploads/4393900/normal_6063ed01d492f.pdf
    • https://burabusuzu.weebly.com/uploads/1/3/4/6/134649623/ae9cf086a.pdf
    • https://folowobudeguw.weebly.com/uploads/1/3/6/0/136051819/xofitigate-kowugoja-gosedobat.pdf
    • https://jezemubo.weebly.com/uploads/1/3/6/0/136094449/wipokevilomiwepiki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b9302f18-b032-4d40-9e20-cb0bc234465f/52213608038.pdf
    • https://uploads.strikinglycdn.com/files/a1697cee-c2af-4bb8-86ed-a8c9a3cf6c2b/82468593191.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e764.bin
c1ef7ff5af419ce49846e184af5a14e5449ebaab7a01ddafc0731071fc3dfbf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE764 5156 bytes
font_01_sfnt_off0000f8da.bin
1a1b0e14822057285451f508647a8c65e2db33750f5eff3837ee14a1292ec7a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DA 10688 bytes
font_02_sfnt_off00011da4.bin
764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA4 16144 bytes

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