Malicious PDF — malware analysis report

Static analysis result for SHA-256 178024848da35eb8…

MALICIOUS

PDF

88.6 KB Created: 2021-06-28 00:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 107eab7fe2ef3c4c9f5d6612a98a353c SHA-1: c08a5ba9e4df91335f3cab1dd282ae3558e813e5 SHA-256: 178024848da35eb84b154965848cbdcded162412e803f3568c753016ca034919
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure suggests it's designed to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160888914adb4b---janejoxitajixirewunisebo.pdf
    • https://alihuata.com/userfiles/file/85134669381.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/11efb0260720c28112f4260806c2347c/wifubipukevabalokuwokame.pdf
    • http://www.flamanville-76.fr/upload/file/40811759397.pdf
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/b2eae0c987694965fb636b0e8998be0b/rojunetig.pdf
    • http://barcabianca.eu/upload/file/31616630783.pdf
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4004272602.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/d732feef31f9bc507ffb5a097f8b9829/ripelejanek.pdf
    • https://binarbaidfabrication.com/public_html/userfiles/file/53902866403.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/2e208303c27c3a53eda06c36ce698c09/radezofapamajotele.pdf
    • https://semsaesp.com/ckfinder/userfiles/files/9637641968.pdf
    • http://zs-oilfieldequip.ru/d/files/43853586966.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a360841af4e---54682805939.pdf
    • https://dichvuketoanvn.org/uploads/files/dowajojotux.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/fb81bab0a8d64c69105f628433c582fd/xives.pdf
    • https://securitydm.com/slicice/file/78666327240.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb5fd90c07---33932203686.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5c7b2a91---51664765682.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a8f7c364b---87679644802.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/33b9e634ba0c441e957a5ae7de1f7612/36334796643.pdf
    • https://musikkursus.dk/userfiles/file/sisogumukuj.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/5v4ft1j77ros051rqubph8dnv0/52045786902.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927c2b6bc27---kedodumejuziko.pdf
    • http://ferrogep99.hu/static/media/file/42128056824.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+wine+advocate+vintage+guide
    • 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_off0000f7bf.bin
e15340d55081aa9b4dab821ebc0c80566508d8e680c566bc169a3a49bd21cb73
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BF 17656 bytes
font_01_sfnt_off00012563.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12563 16792 bytes
font_02_sfnt_off00013d7a.bin
e97217df3c575e292bbe74683524234066320847a98a1405cd08ad2dc529fa3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D7A 10552 bytes