Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad45a35faf123dbf…

MALICIOUS

PDF

88.7 KB Created: 2021-09-11 18:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7796b289168b22556640b94560af753d SHA-1: fee8b872b2257b3be2c0bf9dfad7b8ed3ecc3b30 SHA-256: ad45a35faf123dbf07b00dc37e222bb0fb50b6ba381e5fac07fb05d14867d0bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. This suggests the PDF is designed to act as a link farm, potentially leading users to phishing sites or further malware downloads. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://huntic.ru/uplcv?utm_term=android+toast+import PDF link annotation
    • https://karolinanowak.com/userfiles/file/pexorinunukidevukawotuval.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/vusagaxufifabozosezu.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a0ee72fa0---rulekaruxakotutotesigu.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/70897957795.pdfIn PDF document text
    • https://digbijoynath.in/uploads/userfiles/files/11752407908.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/70305c52c6ef0c9e0bd44bd30b5862ec/pinixakeles.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/f5a7a57cc6879a0edd6966be6e730920/58126102559.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/19223171566.pdfIn PDF document text
    • http://hidropro.hu/upload/67520131312.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/93092068368.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/tigawevibadivesilifisof.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/55060108547.pdfIn PDF document text
    • https://fiscconsulting.com/userfiles/file/43303877602.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/leginek.pdfIn PDF document text
    • http://sghr.ca/upload/ckfinder/files/naliran.pdfIn PDF document text
    • http://rideco.hu/upload/file/jitesinil.pdfIn PDF document text
    • http://balone.net/_upload/file///14868772116.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/3b590de2da81e9924f885e8bb8cd4228/vazako.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/lipobokalurijejurab.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4696387d2e0df26ef0ca95d9ebd83a72/70268096075.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16138cc3410f92---loneno.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210902012342.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://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_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 21012 bytes
SHA-256: d1a34f8688bf3623d81d22e529a9cb84af0dcc9eedbb3ed6b424b4f425c182d2
font_01_sfnt_off0001260b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260B 10356 bytes
SHA-256: 341d0cb2b0cb47b56dc59c40fe631ada5b1a5c4cd81f6e4d9936304fc46b2bb1
font_02_sfnt_off00013d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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