Malicious PDF — malware analysis report

Static analysis result for SHA-256 6699185b076703ed…

MALICIOUS

PDF

81.7 KB Created: 2021-08-15 20:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c88b4d4e0ca4f2ba17d8625321c40d0c SHA-1: 29d63f997de27a85ce315c3175bde3e138f274de SHA-256: 6699185b076703ed2a44d5a8ce1cb1278036580afed3ef30d1968bd8511138ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, many pointing to compromised WordPress sites or disposable hosting, designed to lure users into downloading further malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate effort to obscure the true destination and leverage compromised infrastructure. The primary attack pattern involves tricking users into believing they are downloading a legitimate application, likely leading to further malware infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://josquin-capella.de/download/kunabufopin.pdf In PDF document text
    • http://griswoldremgmt.com/uploads/files/jilisazokejulagareja.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/31299712695.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/f858ac2e10d17c7482aa3f806195ed30/movikufirosakizasatepuvap.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac92372227---45609628482.pdfIn PDF document text
    • https://j-kowalewski.pl/uploads/userfiles/files/46484599377.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/77183873803.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094240d54ca9---73819852501.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/feemeeiuvbn6k0b5uc3var01li/gegaxibikorejemakipusegar.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/f7dab7f324a29ab75f8dfc2df053a396/basof.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/6e2b5f55f228c691c2e4ea93fac7ed16/nuwafozitewotufoninixega.pdfIn PDF document text
    • https://coevent.ru/upload/files/rebefusiburawol.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607059b04ec9d---refokepusomepapoliladofij.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/0n2d4cf4f38bi59l7r2k2q469n/nosonipupoj.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/zunutatone.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/69743207572.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d2eb97b1e---jojotobolozaja.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/554bfefffd47d4be3a531991131426a8/87701684362.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/11184356648.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210803_F030ED73F7C02D6E.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9e21095c6---bapiregofinejaxok.pdfIn PDF document text
    • http://ypdtools.com/ckfinder/images_store/files/25441428979.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/1906384705effe55eea53cc90290cb56/92497226187.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d58098a02dcd45b1941efbbd61e439ac/29413637524.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/61323450967.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/zokegidefafekiweviromom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=call+of+duty+mobile+apk+android+oyun+clubPDF 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_off0000d7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBA 11092 bytes
SHA-256: 246a602ca48510bdeb428f07cc33baf9f38296835742c6fc8d3b922739468da3
font_02_sfnt_off00010966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10966 18520 bytes
SHA-256: 3854dc572a883827d35bd715b649f82543c1e3c3d8571381b69065d57da26871

Open this report in the interactive analyzer, or submit your own file for analysis.