Malicious PDF — malware analysis report

Static analysis result for SHA-256 709136498d98fbed…

MALICIOUS

PDF

79.6 KB Created: 2021-09-01 21:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d5b54bd6560e3d939355ad09d52ad677 SHA-1: 27347d1a004c2c812c65f4e8cbfbeb40a9bfce2c SHA-256: 709136498d98fbedb470f14fcae4fac7f524715aa0f63aade3e6c50e22067e34
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution lure. The ML classifier strongly indicates maliciousness. While no scripts were directly extracted, the structure and heuristic firings point towards a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • 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://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/c2115e4df4493edba2b640b4ea57b521/37191357012.pdf In PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/949a497d99ab466660b599d33bf6cb82/bigadobuzomepu.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125046ce3cf6---lazibabugiwanidip.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/87399188715.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/7e678ecf54cb0d0fb0d631b82ec73c94/57395579298.pdfIn PDF document text
    • http://chikatere.com/Upload/files/52176727877.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aea5298141d---momisolufid.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c02d2544b3c---sepakufaka.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/1349462060f0a8917970a.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099d4ab106cb---vurejekujixemovixufupek.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/xojasofeborufolog.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/h0j25sr51k5bvcho2l9pi55rrq/temuligadusozavi.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050107445473499.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/fizisedulovelimowe.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/90453017561.pdfIn PDF document text
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/q8n7ak1qleus9fl8mekut2pssm/71516117277.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/nijetunusirolojanaxoxemi.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/38550145351.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/54178942507.pdfPDF link annotation
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/icdtkmt45k5fhqqjrp7u17gtll/faderaguvedadu.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/zupazojote.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/mivekesa.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/fifozanotubumotoxevarozo.pdfIn PDF document text
    • http://dison.cn/filespath/files/20210829131244.pdfIn PDF document text
    • http://xinge168.com/uploads/files/20210812055628_435009.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/dbaefdcf218f5192846a1160c3018e75/58901053125.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=racoon+in+tamilPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 19584 bytes
SHA-256: f626adbd3bc27cb9d0b09710e286a537bdb927a46bb3f933a439eb07e740c667
font_02_sfnt_off000118ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118ED 10036 bytes
SHA-256: cf6939ab7099e34385616f9c6a715b5df65a0dc4ed226620d1bc5bd4e060225c