Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae3ad6f9eeb51ab…

MALICIOUS

PDF

82.1 KB Created: 2021-09-05 14:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a0091d27479f9d1f67237c236c2ecbf3 SHA-1: 600af45f276fb2c0b3fdd73e29c842f829214cf0 SHA-256: dae3ad6f9eeb51aba2a6e944477da9f6cda7d44b58191adb9694e57ebbdefc84
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classification and ClamAV detection as a phishing trojan. It contains numerous external URIs and links, many of which point to compromised websites or domains designed for SEO spam, suggesting a phishing or malware distribution campaign. The file's structure and content indicate it functions primarily as a link farm to lure users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://coretry.ru/uplcv?utm_term=mindfulness+colouring+book+pdf PDF link annotation
    • http://seabeachthailand.com/UserFiles/file/31754253684.pdfIn PDF document text
    • http://susasoft.com/upload/userfiles/files/54555501863.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/72612e1bbed24d691cbf285a4e99e464/nagovenisixidurebawuvasu.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/th465j4ja9c13urv3vasua1h4a/garogajigapoxudosini.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/mu1trkdfe1tr11vo4266pjt9g9/51817845131.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/45794059481.pdfIn PDF document text
    • https://gloriouz.in/ckfinder/userfiles/files/96897627937.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9a44f054c---xidopox.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/kilizujiwiwaj.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/4220411280.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/manibelogidavafa.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/0dd7898abba80577c9e20510c7d098c3/68986512571.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/74609642203.pdfIn PDF document text
    • http://theettiaresottawa.ca/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/fugomixi.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/g99dkguspv2ivndifisotdflf4/bonajufap.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/a1f2442ef1d1a9a7c2bef76644f2bd1e/58308981238.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/gifedejegulogijivadipu.pdfIn PDF document text
    • http://slpclassof67.com/clients/45391/File/virutenefumale.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/8b4ea2cff6e7d7adb7290c5a8c366985/togalubabodut.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/niweti.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/fogemogamipokatilu.pdfIn PDF document text
    • https://pmms-online.com/assets/file/magegaretuvewudepaz.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/bovodugusovumol.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/vpdkbla0s64i1oua11jjsoq7tu/giweduzibefexaxen.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac136d42292---87401540177.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/opb3nl522e92v5eqiuqu9v0djt/26159519260.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF563 17144 bytes
SHA-256: 8cd8c6d29b708115b7da670e0cbd6c5f032e548eca1fe4591777e2375dbd7d6e
font_02_sfnt_off0001219e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219E 10860 bytes
SHA-256: 2a36c3292cc7da82f7a60f121b0fccd1f657930c33fffaf86af9c9d7af530f7a

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