Malicious PDF — malware analysis report

Static analysis result for SHA-256 6517248feb3ab0fd…

MALICIOUS

PDF

93.7 KB Created: 2021-06-30 23:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b22cf9fd0d6f6b4df918e879e5b152a9 SHA-1: 87c4740ef228dd4a0043dff9d8f952d19c7edec4 SHA-256: 6517248feb3ab0fd59a67394dcda1f70f7e2f59d67340709c75c131f5a48a1d0
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites and other domains, indicating it functions as a link farm to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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 http://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/dozelanafatexedofatixiket.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f570203ae---43098301584.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076d87a46b24---25228893950.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/dfe59a880df1d19ea3899c5d5cd800c9/suzifopix.pdf
    • https://luminex.pl/upload/file/19480467205.pdf
    • http://pitneyclan.com/clients/c/c7/c7afcfad87c307b096642b2e35f52d25/File/sixidogij.pdf
    • http://howsonfamilyreunion.com/clients/5/57/57b8fe7d350e782a16e6afc8bdcd6467/File/4361486035.pdf
    • http://www.look4job.gr/images/_user_na/file/29433604770.pdf
    • http://falconartistmanagement.com/ckfinder/userfiles/files/47471777197.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/1p9d0fqermi1dnmu1jqc8mns42/6079219975.pdf
    • http://thankschicken.com/uploads/files/45397389468.pdf
    • http://kppzp.pl/userfiles/file/31384965186.pdf
    • https://soalmatematik.com/userfiles/file/wexadenasejavatixeduwidix.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/ea443efbdab6d67d9ffa88416fda4399/lujafodetatamemuzutoto.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af6b05e5a5---dojuxasekakew.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/22ee609be4bb50456902126b85b706f2/nixuwip.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/443b642e8cabe42e65eb703a21e70707/jetabolirikoje.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2012a25fb---pajofugesune.pdf
    • http://alhouti.com/userfiles/file/jesegaxavagokavixun.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609de547719df---6049671731.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16089834c820b9---sigijirabulepovakefesiga.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/c1c1fsse0mr0j9nkh3j0b12hfu/69394901445.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/8d2f3d1b9830fbadd0a87b28962b3848/rugeriwi.pdf
    • http://mini-garden.ru/userfiles/file/21489118642.pdf
    • http://fszhenjia.com/upfolder/e/files/20210623101415.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb41e171f3---tudubika.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=checkmate+without+check
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c6.bin
1593660da8f709c0469e6a235f7ae81297c04984bbaefc0a2de569c87b2bd9a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C6 10388 bytes
font_01_sfnt_off00010e6c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6C 16792 bytes
font_02_sfnt_off0001267e.bin
8faf9a6f2d2aa6e9f2c812e73440859a485f3eae4d1d8ba7ab82ae43db4648da
pdf-font-stream PDF embedded font (sfnt) at offset 0x1267E 17160 bytes
font_03_sfnt_off0001531a.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x1531A 16312 bytes