Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f55c3c3fca134b6…

MALICIOUS

PDF

83.6 KB Created: 2021-07-20 23:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 967eb8ae031f1c9232708040df36d3d8 SHA-1: 427f3b0a526d22451314d04e619e78af68627a4a SHA-256: 2f55c3c3fca134b61c45ad3141e59557bbf91e249c3740010960df01ab8e8393
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external resources, many hosted on compromised websites, which likely serve as a link farm to distribute further malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a pattern of using compromised infrastructure for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://aadhaarretail.com/administrator/imagetemp/file/vikiv.pdf In PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/7cc905cb12afa261a7f5d0e56fc2f8a7/85263737883.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/34770828513.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b760b02eec---57688418264.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607940c1c8b3c---zetojesarapatavafijiw.pdfIn PDF document text
    • http://strandedtattoo.net/file/16004457600.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/9a4ab03c87193627546e3eb2e97f9976/57714617342.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/rowiguvevaxefipetonizifi.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/nukoro.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160deb6cf060c7---59263351793.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/b2b8139f6d82d720e0aeb31857f9ef95/manedexerotoromofes.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/25874404855.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/94256978069.pdfIn PDF document text
    • http://smithmaloney.com/clients/3/32/32eae1a42220421eddab78da2f55685d/File/72232134960.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/lomewanorotezifitepasaja.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/gudusemigowuluzoje.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160eccd4e95594---jamemoseromemowa.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/rawosedore.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/29b8c12b3106cb2ac712062a325ac747/vopak.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/dozejunapajusilejugowalu.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b8d792ce5---42855472446.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=animal+and+plant+cell+diagram+labeledPDF 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_off0000e45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC75 10692 bytes
SHA-256: ebf687b1a2ecf023a40dba55f31832ff1222888bcbea589749429b25b8ff29a8
font_02_sfnt_off0001146e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146E 16740 bytes
SHA-256: b63f87f2ad2d50b2f1d9eaccb83a33494328174dcb2adde6dad60b9cbc43e232

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