Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c7e053b4c6fa3b…

MALICIOUS

PDF

91.6 KB Created: 2021-06-11 08:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecaa9097295d2711ee94ba529e089e2f SHA-1: 4cd477a74d29b0e85e42d17288a47b8c07abc957 SHA-256: 97c7e053b4c6fa3b2765f1abc80efeef9ea6057deb2b1c13355e42794ca2ef0f
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 document contains a large number of embedded URLs, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crewmak.ru/uplcv?utm_term=lag+ja+gale+se+phir+ye+hasi+raat+ho+na
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd46b1a427b---6333588455.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a9be26f22---42814608850.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/bepj2pb43os9el7iufs81r73fu/6903678392.pdf
    • https://an-professional.ru/img/files/file/40483936993.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d578fcc040---zonabukovonidumadumoxupe.pdf
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/61ac4017fd26c93ccb23df4a32946fde/90048802535.pdf
    • http://ampletrekking.com/userfiles/file/tujodaf.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/136d57c65a245297f904ce65676cc3c6/84853277349.pdf
    • http://www.cafeinca.com/img/public/contenido/file/diwarivewokalironorur.pdf
    • http://sam-global.ch/files/file/vuvujugopogobik.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/5ce022bb3d735c861b44b24357a1da56/12802456165.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/996dc85c057f383d11614116737d973f/76748651398.pdf
    • http://beloezoloto.ru/userfiles/file/86525759148.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751118e32e1---45470171799.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a035131bae1---89445379628.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c164259ab---96537645580.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078e2c210e8e---tikaragokiwu.pdf
    • http://zabradli-znerezu.cz/userfiles/file/22359851384.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • 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://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe69.bin
be14e4cbf64116f37ebb3d21671b1fa784e47cd582735a042c6e53bbf2266ac1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE69 4988 bytes
font_01_sfnt_off00010f63.bin
c5abd6bf9145325cc2b2d0077aebb00545d5d73b01acb453eac9e1925675041b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F63 10964 bytes
font_02_sfnt_off000134f8.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x134F8 4324 bytes
font_03_sfnt_off000142f7.bin
7a7f2a4748a5da61292791f52537078801e8b836cfb599360ba97efb5e94a989
pdf-font-stream PDF embedded font (sfnt) at offset 0x142F7 9036 bytes