Malicious PDF — malware analysis report

Static analysis result for SHA-256 8349510eeb971375…

MALICIOUS

PDF

80.9 KB Created: 2021-09-02 14:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 39dfcf4bfa21011b0891e302bd6e7f39 SHA-1: 71d01a67f0ea42cd36bec87f34173c726fe2d6fd SHA-256: 8349510eeb9713756a048ef3b5abce9280f355f01cda5a31bbea3c72f51823af
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 high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting it's used to distribute further malicious content or phish users. No scripts were extracted, but the PDF structure itself is weaponized to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edcabc6f0b6---kipajilovuti.pdf In PDF document text
    • http://27derajat.com/assets/ckfinder/core/connector/php/uploads/files/zawijoxepowufefowukozutus.pdfIn PDF document text
    • https://retta-bg.com/userfiles/sazifer.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b312a949719---piked.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/vmio530dk1744se29dn8jik903/lezubakivopigufonififoz.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df9bd13acfc---87071448842.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/zofiseg.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/c4ddae84c25a1c162256498492a72674/10224079983.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/63897698565.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/44446819727.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/89787839670.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/munodijowudokanatumavase.pdfIn PDF document text
    • http://namlongprojects.com/images/uploads/files/xasabibamerijogeza.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/fijapuduwoditozopemoke.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607788ccd48c3---84378673281.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2f95dd7f7---18797830211.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/bbd8524361d0049e396b254a0311865d/30809464839.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7205094e5---bagoxaxejolibafutukebek.pdfIn PDF document text
    • https://coherence.cz/userfiles/file/84217973082.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/wodazinosakagimovavope.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/53118311954.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/91930004233.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/vefurogamumonofafito.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/zufuwokemu.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/nepukemamijopodigezovi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=oxygen+therapy+pdfPDF 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_off0000daae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAE 16956 bytes
SHA-256: 442f96bc2cf5b7488b97292ee98444c10987eb60d72978ef261d4721e058ab73
font_01_sfnt_off00010640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10640 10592 bytes
SHA-256: a6415e24e7634d4cdc807569fdfed3022ce34bcd497554d7108568c7bdee954d
font_02_sfnt_off00011e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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