Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c64aa3db37e4f6e…

MALICIOUS

PDF

83.7 KB Created: 2021-09-06 12:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7de89ebfaf09de0712a14a3ed20dfd53 SHA-1: 4325755d8e1ccce148017391fc5e940566fd90e7 SHA-256: 2c64aa3db37e4f6e3f6663fa64667b832c89132db58aa6bebe0d495c3653023e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded links, many of which point to compromised WordPress upload directories or directly to IP addresses, indicating a likely attempt to redirect users to malicious sites for phishing or malware delivery. No scripts were extracted, but the extensive link farm suggests a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://bestcoloringpages.com/userfiles/file/88645039186.pdf In PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/mabipubesap.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/46253646245.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/70145148695.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aaac8b3dd---dunazel.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb88da839e---67039047237.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/7beaa334d3729e3ce5f834215d8cada8/96028605635.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/rifinisumeruz.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/68230696512.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1608f13d01cedd---salezenirapu.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/19925058178.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/80941426775.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/77553043860.pdfIn PDF document text
    • https://familienbilstrup.dk/ckfinder/userfiles/files/bofaxakulevenafabapuwubom.pdfIn PDF document text
    • http://dienlanhhuubinh.com/upload/files/70251295421.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/fumikasogoju.pdfIn PDF document text
    • http://saptpadi.com/files/file/kezuzimosu.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/ru5eno9ldicpomqtd96kacmb62/33792175604.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608512113c1e0---fupasijeguju.pdfPDF link annotation
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/31840733848.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/62120966674.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/89abe0a369a27e076fe49c8d5bccac94/fabezaboj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=thompson+center+impact+sb+manualPDF 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_off0000e206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE206 10844 bytes
SHA-256: 64a59580ec85dcf1dfea9496f6a274c556e39aa19672945f42ffbc0eec9e0939
font_01_sfnt_off0000fa9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9C 17828 bytes
SHA-256: 616bfa57fce913cfc92042d91b4cb25d166563deb02b043f7576bcefbcc6e574
font_02_sfnt_off000128c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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