Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fad1402b2298f98…

MALICIOUS

PDF

114.1 KB Created: 2021-08-13 19:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b591d2d55cd6ac39d7a316b1974b9173 SHA-1: 292065ab494fe34f0f98dcf0430ca26ad0cb7e22 SHA-256: 1fad1402b2298f98bfbbdc6f68bb80b7b71d617fa38d1732a594089180d9b97a
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 it likely exploits PDF vulnerabilities. The document functions as a link farm, containing numerous URLs pointing to external sites, many of which are hosted on compromised or disposable domains. This suggests an attempt to manipulate search engine rankings or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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://shortguycentral.com/ck_uploads/files/petojinas.pdf In PDF document text
    • http://massimomoroni.it/userfiles/files/pepufizudaputuxarogul.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/8968045722.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/ag7jmirqvpudn2sohr9ca6ep63/vorupugi.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f63924135e0---vusavulajatasadikeg.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/715f66896320c8117200517ec9a78818/lifaletatosu.pdfIn PDF document text
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/70310175069.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/18471213733.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/38648852329.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/13460908019.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/mj42o77iiptvv6q4irggafqtu5/22460226841.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/mefazobozipuje.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/8936846709.pdfIn PDF document text
    • https://preciseenergygroup.com/media/53698827762.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/garajonuzozowinigem.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/52941223217.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/fujuberunuwuvuvivofeki.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/5s8j8pthhrlqhd0sc1v669kp62/vowiboruxojolobufozezuvux.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/95363916098.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/keterifumosegonuselek.pdfIn PDF document text
    • http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/29653061805.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/2conl6c7jkklqsa1hps76lsea6/44510398467.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/sikoxidenagidirotusire.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/mudovoz.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/8364548009.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/pajanubuwisebesofetapeva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=omron+hbf+514c+manual+portuguesPDF 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_off0001558e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1558E 20432 bytes
SHA-256: 3f80e2fa506cae96f6e034b954214ebb8ff0ab1a37361d61406dfc886e46ddac
font_01_sfnt_off00018717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18717 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F2E 11364 bytes
SHA-256: 1655edebedde5818c3b03ada0d3322987359cbe151689d7f91bf0f710ada671c