Malicious PDF — malware analysis report

Static analysis result for SHA-256 069aa1f67cc3050a…

MALICIOUS

PDF

91.3 KB Created: 2021-07-28 06:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 87fd220735fa8818e44f5810030e2237 SHA-1: a2b8b28d7e5c182f4518e1eefc28a06084e5b81a SHA-256: 069aa1f67cc3050a346372f8c7b6003f98e3cad0e0d162e2dc96f3ba973e322c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple external URIs and link farm heuristics points towards an attempt to redirect users to malicious content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://ladyvenus.it/userfiles/files/fokodewibejofa.pdf In PDF document text
    • https://vayamcs.com/content_files/files/60614995550.pdfIn PDF document text
    • http://teknis.it/userfiles/files/3384631473.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/jijupeviwo.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/jo36vtkej5g5t9eqbebkj0nr17/39211039311.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609860afacbea---23275064459.pdfIn PDF document text
    • http://myucpb.net/userfiles/file/31380565673.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/842be6d7783a8c8576966925715600bc/86489190965.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fu37seoqc1inso0i7sp3mq27o4/1270478729.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a84eb403dfe---53882919378.pdfIn PDF document text
    • https://namlongadc.vn/uploads/news/files/13460972900.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/zinexizepoluburimarenave.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/69f93954eb9137ce29570e6c45a7a56b/vivilovisuvinefedoraguz.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/mifidukitobuvutiw.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/gaxalowutavexix.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9cc7d585a---wolosezipujikavu.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/mebivorerobepowut.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609347f91ff34---59236628315.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/96054697890.pdfIn PDF document text
    • https://bulgariapools.com/contents//files/gajifasaxekidajalina.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/j0t0gfgvcucft5g6886u0jqrf4/3049942667.pdfIn PDF document text
    • https://honda-otolongan.com/upload/files/xavokabad.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8c5c67cd6---vifemutuwezoporajisojaz.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/xizigepokasula.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+get+my+experian+credit+score+upPDF 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_off0000fd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 11204 bytes
SHA-256: 28ad046855aa9043acb2b771b90f555f24371624af182efb7d144b7344cb70c4
font_01_sfnt_off00011759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11759 17352 bytes
SHA-256: f66814a1fae7d8750cdcab273e4fb9d7a4c322138fb4eea5a2a42218386983e0
font_02_sfnt_off00014526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14526 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1