Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c41f1ad9b34732…

MALICIOUS

PDF

81.1 KB Created: 2021-09-19 12:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 77e89322847bfa42c6c5149aecd5f17d SHA-1: 8e7ae151c799777575e71c65c0e29f622ee1cfbd SHA-256: c6c41f1ad9b3473254b2d50458bc5ccc527d694683950b4b6f7184db26b4b224
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple external URIs and a link farm structure strongly suggests a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://ketchas.ru/uplcv?utm_term=how+to+loop+an+mp3+file+android PDF link annotation
    • https://fresh-cherries.com/ckfinder/userfiles/files/50332920537.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613150d3beb40---39064021526.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/21932666009.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/vavelaturamovutuxetebak.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/dizupofixuxol.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/20903288118.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/zufarabenisalo.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/76622812826.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/59841570115.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140215f41773---vilakati.pdfIn PDF document text
    • https://jmclimatizacionhvac.cl/images/subidas/file/fipirubibufadoxe.pdfIn PDF document text
    • https://lean-ds.com/upload/editor/file/28145416902.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368d359d72a---pudukuvufarenutipubab.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/c8a0b5e2c56c35e341b1c20854316bc4/78281017838.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/b94b02492598e67bf680599a472549d2/durowijipisa.pdfIn PDF document text
    • https://srilangkapools.com/contents/files/xazinibokuwamodapamafon.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/xifojomom.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/76539152309.pdfIn PDF document text
    • http://ageddfjtjgrade.pretty-match.com/upload/files/rigej.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5ffe4fa5c---59779290643.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/735958972.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/nadofokosapowiku.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/luginozepesurewikirimafol.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/44188084281.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/nokasizufanubu.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/86350260121.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_off0000d8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A0 10740 bytes
SHA-256: 2b60a3b9429cc8ef6ee96bd73c26dc7a05cb6ccd90cfacc3ca2724c8fdace9f4
font_01_sfnt_off0000f146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 17484 bytes
SHA-256: 160a946be9b172a8dbbb885ee1b90a6eab0ddd5983d4cbe03369cddd52532881
font_02_sfnt_off00011ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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