Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd63de9a17d8616c…

MALICIOUS

PDF

139.0 KB Created: 2021-07-15 20:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: abbc12f86ab9d91f0a959f552271a852 SHA-1: 42a0607c4653b263e152587436b6a511727eeda9 SHA-256: dd63de9a17d8616c2f7da3b138a884c2bb43315669d2fb37d8b52229cf909e94
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other potentially malicious sites. The presence of numerous distinct hosts and the use of UTM parameters suggest an attempt to obscure the true destination and potentially engage in phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ac0e41d61---89454361683.pdf In PDF document text
    • http://ecohost.ru/pics/images/file/67875836982.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ac67b3f85---51731104189.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/936b4b199a93b00cb36962ba664b1d32/ganegu.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/c72112bb07db87771bc8ec8069446443/lilivikukifogizadanadido.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/88f76f6891f05e78e9fdc50af7349b64/sefew.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/6e4e545a08b742b83f0491845e0cd11e/sibewuvufosibiw.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa3493d65e---basitoxabajilitogo.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/fb47a6f8e96ff3b4c2eb3d6c5fb19712/sokiravavavedumopajil.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/66rpk7frdc8ip7s7taiu0l5jd1/51686714270.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/kaludebuwikesexipuzadudub.pdfIn PDF document text
    • https://cafesca.net/ckfinder/userfiles/files/gulimifavumodemipulelasom.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/xuwomenifivewa.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/d570593655c665428dff7ca9e02b8e4a/14256962565.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7509c8c0b---32581968621.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/viraninakonabuselil.pdfIn PDF document text
    • http://ashioke.com/images/library/File/65996409691.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/ratenonefesomevolibav.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/87ptkh66oriojqt9hv7ju02q5a/pafavilekufaxafikodedifod.pdfIn PDF document text
    • https://luminex.pl/upload/file/52002067153.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/zikadi.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a6f9462cd---jigejefugugonitib.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/nageme.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/69895808716.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=irs+gov+schedule+c+instructions+2020PDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/b7c4fd5fb5c17a488b6089538fe5027d/bezasezavavifusasi.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_off0001bf55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF55 17484 bytes
SHA-256: 852fc0fd8efe3b3c46c04a73f68a5d25f02823cc4feca21fe0c9dc3112bd39b5
font_01_sfnt_off0001ed6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00020583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20583 10844 bytes
SHA-256: 949fc61f5624d47ce273185555ba2a1f6887d0df4db9312c255f92e025979afc