Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ab3130e3c879fc…

MALICIOUS

PDF

83.5 KB Created: 2021-08-17 23:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a4a08f874b8d435c4c549f920060bc67 SHA-1: 3a24be34995b887837cb429dd4243baf22e55502 SHA-256: 01ab3130e3c879fcda8c6309ebf3f9f3cf5dc19c90df0c27a0b123cd4e82db1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 link farm pointing to numerous unknown URLs, many hosted on compromised WordPress sites, suggesting an attempt to direct users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm nature indicate a likely intent to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://amirep.com/wp-content/plugins/super-forms/uploads/php/files/91d53fd1f6c2de0a898da3c4646288ac/lagugu.pdf In PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16254698801812.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/gerubufeburavonujutiso.pdfIn PDF document text
    • http://zzps.pl/userfiles/file/besokuviwefite.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/62576406889.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/36892601860.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/79617362560.pdfIn PDF document text
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/97731995841.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160942fd41bd4b---xukogopafunivofabizol.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4172d6a14---tetapo.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be58c7502ac---76260358872.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/877gaotkjamhqtap1vqiokpccf/75422926911.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/gr4dme21tovjhbept2irop7qc3/12771107371.pdfIn PDF document text
    • http://fhhsclassof70.com/clients/4/42/42ce21dc30e429aa976ba070b22ccf93/File/xavuvarosegijo.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021051322002357.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/605b2d1c21f7ece8c41cdb334e3ba67d/vekawenoruxej.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/tobigebopurav.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/56531913195.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/9e4321be3339ecb4204162457bd9d729/xakirufedutokinixigatupiw.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa74d3293cf---tolusufebevijumupe.pdfIn PDF document text
    • http://saga.diamonds/uploads/ckfinder/files/8698285.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/a8ac450517a3de25bf173b6ce7c728ca/96972015.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607a93ebf0a47---61222367938.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/15572137204.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+breed+wolf+minecraftPDF 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_off0000e1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A4 10684 bytes
SHA-256: 41c65d8df3078530912c55e283150fc9e289e6109c5969be6df24c9133cc6a08
font_01_sfnt_off0000fa1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11231 16800 bytes
SHA-256: 129ebb0968553e60c95e82e8ffa780979337eded0a73cc7f7df463d7557d17b2

Open this report in the interactive analyzer, or submit your own file for analysis.