Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df0bb7a1d82861d…

MALICIOUS

PDF

86.4 KB Created: 2021-07-22 20:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b7a480813b42e957e4b4282d37394dfc SHA-1: a3ffff1e0f58c8b7e09e0361e1ec83090262ccb9 SHA-256: 7df0bb7a1d82861dd9360d4b996c83c9a53fc26771515741493be3eddb0cd8b6
104 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the structure and URL findings are sufficient to infer a malicious intent to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16099834e358cf---sinigupukosowufeli.pdf In PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160864989062e4---61135458370.pdfIn PDF document text
    • https://alutat.com/data/file/jeredetolikivaru.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/zufulu.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/rguh66kg6m6ve4i3n7mmj46sll/17936344277.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160d56d38d7def---wilej.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/bakepukuwilemibofanadipa.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160be441cbf0af---wamijutebo.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/b7c63c3b53cd95004eb8f74bc27f87ef/34649195120.pdfIn PDF document text
    • https://capecoralliving.com/media/file/devogazezuw.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/11c834e1b4aed9fa66a599f152aa1443/79077944304.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608541107da93---23215771462.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/c1c6ff2ab38fe937e6c58214f0a22c16/mizagigivibusenunuxam.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/re47rja5bkkup3i7iric81met1/86258860510.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/e182bfe1a15fe318aec7fb5e9f37b954/66967404950.pdfIn PDF document text
    • https://mygo.com/ckfinder/userfiles/files/336027949.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16252398281954209388.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c3caf4ac8f9---64564725906.pdfIn PDF document text
    • http://trungtamdaykem.vn/Images_upload/files/59781294472.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/1r0hg5ouj5ht8b3lh8osl1stnd/getaje.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/i543vmi2lldo1mtg3vnficajvu/pavoripaxamipajiwe.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/konogotinag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+search+pdf+file+in+mobilePDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/sigopakopadesusakite.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8B 16884 bytes
SHA-256: 166cc3533b893ce5ed225aec3b78dc98b19599ca3462d3cbb92bb4aa311750fa
font_01_sfnt_off00011961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11961 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13178 11104 bytes
SHA-256: aa8146d20ac9bef0d48917ac8454a2d763f7df059cac46afff18ef1fa9cf5312

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