Malicious PDF — malware analysis report

Static analysis result for SHA-256 9398f4930354f70b…

MALICIOUS

PDF

92.5 KB Created: 2021-06-25 18:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9f9a023b61de868db1b31a8dd8da496 SHA-1: 3e7a4906e066687f452b7dadfc3c20848c43692e SHA-256: 9398f4930354f70b6e9f7aea52fb5f8c8e65918eaeb8b3632e940a019c898d94
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of an IP address literal in a URI further supports this, as it is a common technique to bypass domain-based blacklists.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/4d3b27d3f77fb46dc80b9458be668601/vokigupu.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/dcbc15b15c63a14debfe0a702b5d6ebe/finazajosal.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc2e79eacc---nidozebufobafoduvelux.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d8f3afded---98696908402.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcb2d389b7---vufupapujezenejepuxuv.pdf
    • http://candientushinko.com/images/file/13583320255.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075025b9ed74---kusakow.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160958ae7512c6---37020867192.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160989bbff08cf---vezixevavetawomejer.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/buik28p27qsin87q8brc570k0n/tepiwon.pdf
    • http://vietthanhstone.com/images/news/file/raludakuzisajodave.pdf
    • https://study-abroad-travel.com/ckfinder/userfiles/file/madidu.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607195389fb7a---87791001859.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/41327b733f31cbf319bbd10f6159bd20/12164034759.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/8e104484f5f9b62c3df1fccc5e9b6bea/58519776062.pdf
    • http://xedaptap.net/userfiles/file/41511454336.pdf
    • http://mofrantech.com/userfiles/file/gajerifenerejira.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942c5fa4513---43253799200.pdf
    • https://clubforeducation.com/FCKeditor/userfiles/file/bozaxajevizopemoje.pdf
    • http://naturallabs.fr/userfiles/file/lolatulokonoside.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bae287df3---xibibenimagu.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/qerls09c69qt8cibd2fq27u4g0/52530301251.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16076e512a2977---7854257674.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1d1a97a3f---871702962.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/964d7a9f23b5e9583459befe76396228/98548489757.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/36d59a7627a68886282f7f228b8e4514/repiwunisalilukemukabeno.pdf
    • http://stonebriarranch.com/clients/876969/File/37258488279.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+fly+elytra+in+mobile
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001041f.bin
eda18e370e0f2a6e765bdc0221151e103a95d15d3dfcc4815ab7bd1235a7c929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1041F 18588 bytes
font_01_sfnt_off000134a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134A3 16792 bytes
font_02_sfnt_off00014cba.bin
7e17d02c3cc7bb8de674296182435e76d2936861ea4981732e710aea79de6d82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14CBA 10540 bytes

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