Malicious PDF — malware analysis report

Static analysis result for SHA-256 815819063502eb72…

MALICIOUS

PDF

84.6 KB Created: 2021-09-04 15:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1ceb141e9f011e1346bc1fa1faec811f SHA-1: bea1f5a338cb9fe4f4e48560dfb431785f86604e SHA-256: 815819063502eb72b192dd2b79509584bc05de0d9e55bffb51c321020ab6fb89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/e085dd1b8ba75670784872d198c2320c/96875089778.pdf In PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/70b2b5c8b3e07c7a3ef43e70e9b393c2/93895232250.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/xijiwejuxalesabevoz.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab166e3ddf---pokezudojosu.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/15097178234.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607276afab8e7---pobuwiti.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/v2p14v5t1qa7uhol5lg7jvof0b/99890713089.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/53197388695.pdfIn PDF document text
    • http://baove24h.org/upload/files/mimizavememafuvutavinune.pdfIn PDF document text
    • https://duel.pl/userfiles/file/foverogasovikavox.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/imafvtqocuioj5rgdh6q5otrc7/28546935739.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc790760f3---19416561544.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/62782008388.pdfIn PDF document text
    • http://kovospm.cz/fotky/file/53282268883.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/adca41d0ceda86b4a353db3bfb0d9524/12353457469.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/om86r0iq6sckahsi4i57op4t61/79329827967.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/cf39ba050c99ff004687fc2112409ef9/33720163960.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d88bf910517dd1e8ed1dfd3d8438870d/24116873723.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/81727893304.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/35492968923.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/hvlp5jp01mkmfu4569gat34mu6/58095735223.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bedb2f6f3f2---gawoxukalituzebe.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/sejukikekamig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=james+cameron+spiderman+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46B 18400 bytes
SHA-256: 76d9d8ff3bf1969a40be9ae05866649eb7f98f0d85767f52aac92a63896dab4f
font_01_sfnt_off00011428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11428 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3F 10628 bytes
SHA-256: dabe7cc6ce3a3bcf598ac3f2aad89c325ed99fda68f62d927fac7e71d828351e

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