Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7bc43b43309bc82…

MALICIOUS

PDF

80.9 KB Created: 2021-06-29 02:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 40ae55bdf1587e10fef1b8d87b3407a3 SHA-1: 723a04c630235c33f6cddb12b4e0418a2c8865cc SHA-256: f7bc43b43309bc8289904b971ff36cc1bed64333bd2ac5189990c1775bd3926c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised CMS upload storage, suggesting an attempt to lure users to malicious sites. The presence of these links and the overall detection indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609158c46deb7---58764993841.pdf In PDF document text
    • http://coumert.com/images/file/wokajolamogafidoj.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bf0b3903e---tetovulurugif.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/7c4bd9e807bdf2abfd0aceb8dd3b08e5/87149349360.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/69ca161893b4eae6c1c56cb1bc4b55b0/28622116766.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56fbc4f2a3---vaxugafumufadojowemuner.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/053c51769a4e70c450a813cc8aad07bc/kidumekibudo.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/44epd5uctodr3i3l89ruurentq/kubonovapiloxudada.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/orusj3jbfed677dqghvkhr6lj5/14175410088.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/72520874869.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/32957417654.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/88083567390.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d401012c18---25903966053.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846dd7d6d30---runutamogimat.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2ea88a454---vefitajijezu.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/imhj83l2crjlvp97kjlpn6q7s0/gaziwe.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/eq5ggcqjbpincgfmbnpvh3jho6/43927855519.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160761b8e20aa7---zitapapadirugege.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba46b22b040---xuxuxidigosigu.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/36575778275.pdfIn PDF document text
    • https://hostessima.pl/userfiles/file/43052242647.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=1st+class+addition+worksheetsPDF 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

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_off0000d5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 19072 bytes
SHA-256: 5430e992dd4b6a478c71ad7c172687d9362045f49ab61d1c3435a6a17d2df1f3
font_02_sfnt_off00011e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E46 10600 bytes
SHA-256: f4e0b70a5f9971070c0bc78b7f491c183ce1eb9b04465f07f254a519dfe7f44c

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