Malicious PDF — malware analysis report

Static analysis result for SHA-256 c707ab08a33013f1…

MALICIOUS

PDF

69.2 KB Created: 2021-09-02 00:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d5b14ec42ee19011acb4d8843e6ca2f4 SHA-1: 7f8057609be63f123cfe2a89acded68e2f78210e SHA-256: c707ab08a33013f1a0d64dd51dab095992ea17c9c680173213146b1c16b176f0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of a screenshot designed to hide clickable links. The document embeds numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content or download further payloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://infrive.ru/uplcv?utm_term=triglycerides+meaning+in+gujarati PDF link annotation
    • https://businesslife.com/content/file/83204233796.pdfIn PDF document text
    • http://soc-in.com/data/media/files/peloviw.pdfIn PDF document text
    • http://yfatc.com/userfiles/file/85138165024.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/420e07ccb7769cd259fa98514ad169fb/33375144465.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/c2e5349f59f436ecdc70028898dcb707/kixejurigujerafubo.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4d4554948---domilefegopewijadivuler.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/digizepikekewux.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021071323583252.pdfIn PDF document text
    • http://shopexpert.com/app/webroot/files/userfiles/files/titasadibabududigar.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/68965678456.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/79a370c68e83cacd168a6520d7a17afc/keminowisu.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/0aa1419c7464a4869f6034c7e2b2cad7/korosadav.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/96500427625.pdfIn PDF document text
    • http://korytnica.net/data/files/fapitazubisuluzi.pdfIn PDF document text
    • https://vinacomvietnam.vn/uploads/news_file/17582754292.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16086e77d49f7d---pofufelinamojabamif.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/34769872574.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/48310578264.pdfIn PDF document text
    • http://mkserwis.pl/userfiles/file/koziwibusalojasagovuda.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/tutibuxu.pdfIn PDF document text
    • https://ka-base.no/images_content/file/49447217120.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/e71ugjdc61bikap9665qo88gb1/13216301030.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160984b77749e7---160647167.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210714160053722227p8kd7bh30x06.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/94595363698.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_off0000b317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB317 14128 bytes
SHA-256: 76898623a95ded3062fa44a83f5ed4d90b6ba7e07673fbde0f79849619938b48
font_01_sfnt_off0000d683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD683 10900 bytes
SHA-256: 318ba5cfe47fbf729e38f51334d120f0ba8f878197f811e3dc49af1ada3e1485
font_02_sfnt_off0000ef7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1