Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69c1174295b1445…

MALICIOUS

PDF

85.0 KB Created: 2021-09-01 23:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: db1bba73b125408a071682087f5a7ba4 SHA-1: bc0c72a37c9811d2461ec5027e038d5bd2d16ac2 SHA-256: c69c1174295b14453d4d9a72036134246cc94f5f8cd81ad28511ce9cbc833d54
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or SEO poisoning attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://worthingtonpark101.com/userimages/ragenebakawi.pdf In PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/b25ae1f8f5efc58c059c095c2acd0fa0/84749344964.pdfIn PDF document text
    • http://pincesorvarshop.hu/editor_up/liwonajub.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/cj1oq8sdf0osk5sha96rc1j3v3/zoregikisimolunuzofifol.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/paguzidakovipelojelesuver.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7opa6pdjhh00r68kjjj5akci25/16284781000.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/vesixipakakerupopo.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/fowovawe.pdfIn PDF document text
    • http://xahuaheng.cn/userfiles/file/90581653959.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a67e6c0d52d---fugexusafafiwugujapinero.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/pepurajesupukanosiwifuf.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/fudusuwized.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/72328798387.pdfIn PDF document text
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/81375722300.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29512e66e7---4259568458.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/359b6cb144d591a7cb865f09e5bcaa92/17966978450.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/437c5154f36f3dc11a55accf7f8a8cdc/kasikenaseletibejij.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9154828f9---roxijugitapenoxumepuso.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/43429601694.pdfIn PDF document text
    • http://willbramephotography.com/gowewedipileladenitowisa.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/q6lnnta6ijs3ph11ng3lm3mt91/24123166811.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/6425072846.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/42517252289.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/3f141bb760973cf2beb215fafcea6946/gazoroxufexolu.pdfIn PDF document text
    • http://asvpp.fr/pdf/17282761919.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6389f1c47---widajozadoxuju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=cold+sore+on+your+tonguePDF 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_off0000eab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C7 17040 bytes
SHA-256: 64e03ad5746f98429f7b978b81da120151943f3134d164a4830004b26a03ac06
font_02_sfnt_off00012e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E57 10416 bytes
SHA-256: 7fb92536cfda77b835bd14cea3438843dfedba67017487e400b4d4d26386d44e