Malicious PDF — malware analysis report

Static analysis result for SHA-256 617a2e365eed82be…

MALICIOUS

PDF

90.1 KB Created: 2021-07-01 20:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 909b45530f5571b986b1959ef91d5912 SHA-1: ecda7f78ce3db89b37e9f124f0df2b4a207f0757 SHA-256: 617a2e365eed82bef212aa8a35314ddecee8d26ca8da0fda50bf5f385118544e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to compromised WordPress sites, which are likely used to host or redirect to malicious content. No scripts were extracted, but the presence of numerous URLs on potentially compromised infrastructure indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c682fba8ca8---lovugilibiwoluso.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607276b34fc12---xawopuruzukopi.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1d14701ea---45610823923.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16090ab491f1b2---68250546670.pdf
    • http://adveotec.com/img/file/78095330628.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/u4p4tdt8qpc5k005bm3d408qf6/gaxofifevatizubazaza.pdf
    • http://ciarajewellery.com/editor_upload/file/rokajetabapadoxanibawog.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac836c913a0---22160694162.pdf
    • https://anfauglir.com/images/file/wolevolerowujegemo.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/1g7tbcum9qbrf4ak7ts6n4ld7j/vazepusep.pdf
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/sco0hgehhuqdthu46oc0hjfuqf/nizixezaselekubuvam.pdf
    • https://pharmnet.cz/ckfiles/files/files/bedawinew.pdf
    • https://zegabilisim.com/calisma2/files/uploads/56198180336.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609427380d831---74386366273.pdf
    • http://tele-fonika.pl/upload/file/49841175521.pdf
    • http://assushop.com/userfiles/assushop.com/file/tonexawunapu.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098931699401---36549808285.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac914aafbfa---dugaru.pdf
    • http://tfforming.ru/d/files/40651123402.pdf
    • http://mygotour.com/FileData/ckfinder/files/20210527_C577BAE223CA69DF.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0b84ee170d82d49259e45d9a213f8d40/72721090768.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160886012aafa1---58795948316.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16093b0bd589ba---22957007291.pdf
    • http://timnhanhonline.vn/upload/files/37831983233.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=growing+a+rose+from+a+potato
    • http://janyska.home.pl/_mjanyska2013/fotki/file/mizaralepamegaxuziwogew.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f73c.bin
6e686959610e7dae240f2f19b16541c324cbf8d43164b99e43c5ff2d8b937b04
pdf-font-stream PDF embedded font (sfnt) at offset 0xF73C 10780 bytes
font_01_sfnt_off0001102f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1102F 16792 bytes
font_02_sfnt_off00012841.bin
1c3fd1b81751e9e685fcb53c74a0ef615a734a47d09620d371502bac777e0b2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12841 19624 bytes