Malicious PDF — malware analysis report

Static analysis result for SHA-256 851e420d9f9efe67…

MALICIOUS

PDF

96.1 KB Created: 2021-08-02 03:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 72fb29dcc4c40408d39c0eb1a371b057 SHA-1: 4ba0f541e5b3b7f05a229093910469e985a4cc48 SHA-256: 851e420d9f9efe67a6f8d9fab88cb10fa92e8b6da35f2c4e205127ef19739ec3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to other PDF files hosted on various websites, some of which appear to be compromised. This pattern is commonly used to distribute phishing content or further malware stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a8f21d1ce---90060823983.pdf In PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/2f2bf51c41012c5dd811aaa428928377/pewosiwilopusipi.pdfIn PDF document text
    • http://elise.pe/images/file/zuwijuzatupuwalifeladekof.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/ed6680b5aef01c3134f8323c0b3ef3c8/54274089749.pdfIn PDF document text
    • http://askort.pl/Upload/file/89645618795.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16096636254af7---66941870877.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acfd40dfae---fejijesosum.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/8063179498.pdfIn PDF document text
    • https://summit-christian-academy.org/scauserfiles/files/96297882758.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/m8urbqg0pafo4mkkrkqat9pbgk/rulofujagipevewitim.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/raxipapijisojitujikoni.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160835245292ff---92191894631.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/2f04e17255bd8c2fd0191847510b5197/gubonin.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/io5lclm425p9j3hf2n78biu181/xular.pdfIn PDF document text
    • http://prattsofdouds.com/clients/d/d8/d85aab9f4bcbae69c8358f7a9990a0b1/File/jivevajubedewepamelilesit.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7ea0679f2---purugivixirado.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/72994269126.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/pemeguxujesoli.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/82255851684.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/14655292163.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160910fdef059e---voxuninogubozanaxewife.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/xonumasudoti.pdfIn PDF document text
    • http://raisingthedead.ninja/In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=isekai+wa+smartphone+light+novel+indonesia+pdfPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC1 3292 bytes
SHA-256: d503c07759afd7de52b502a3506f2dd9658325173f2d5bbbf1ae80a4d55146dd
font_01_sfnt_off0000fd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11526 17060 bytes
SHA-256: 2525dc93bbfb8e245c7feb39b15e2855f77145f6e5dc5fa7b41a51cd4d1d1b2c
font_03_sfnt_off000141aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141AA 16648 bytes
SHA-256: 217fce91b8684b623aa09e09ae10a17b5443796dae600af794f8b818bdedbbc9
font_04_sfnt_off0001584a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1584A 11140 bytes
SHA-256: 3cab5ed6761adccedc55d5c95b3a6f9af373e528d70a5a1dda9e2abbb428e2b2

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