Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7c9beb4a49ddf3…

MALICIOUS

PDF

101.3 KB Created: 2021-06-30 11:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: f38cf82c4e4d767b9593bf62969d937f SHA-1: ca6699d8a6edf8a5039fb179b87802ae374723a7 SHA-256: 7b7c9beb4a49ddf38b299a4930e2c6b56630dbbdfa48f7315753d0dd3e2da180
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to compromised WordPress upload directories, suggesting it's used to host or distribute malicious content. While no scripts were explicitly extracted, the nature of the links and the detection names imply a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://matsusushionline.com/uploads/files/nowex.pdf In PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ju9lkasckousu55j88jm3d1nta/lumavujuxogefefuzi.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/bl6su0qf6ffogcbhmkv08v5j15/gazirekalekirusegeripifeg.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/790098652242d4a90e548929a56f8515/kovejulevalomeru.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/jblpkjlsj0u287tcc2kua1p802/mubofagitezesaninu.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/6ol4mi8br81hogip849dmlrbg5/rilaguv.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/f0fb721401d07973afea834af19f4e1f/41864054932.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/1570a0ebdbdaf1afc37da21b9c00a274/66055047844.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/74852385856.pdfIn PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/34745861142.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/6b15cccd1f9c9ec9566742ec4f6d9d73/popuziputigavute.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c85d7d29387---72018894018.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/0904l5ra6o8f0f0pd981oecjt2/lanubemazuvivorabamixonit.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cdecbe480b4---48222566043.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/59bd3a7e2629f5a1f97e2fac2bdd0f38/zatofezowidisega.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/9nbmqb3doau1mb7i4uuda7bfc0/18153083148.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/6ebf853ed953873fc87226dc5a28b7f3/digibopikusej.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da11e7fa99---59754334516.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/nobevuxegiluziludenexe.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f0d5102f3---sanuvir.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/mj6ioqq9eul84snphmc7e89li1/waloginimuwifomepu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31254d11c7---jelejefigumosemiwer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=wedding+photography+compositionPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d85b4f4df22---73327150928.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4B 2700 bytes
SHA-256: 78febe7b6ea9c2c1d56245d4728d178f0ed51aaa06ed3804b44e357b4ea11e6d
font_01_sfnt_off000126b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B6 11024 bytes
SHA-256: 435f03e6706f07b774647698701a0444f6358e9396015c524f640f9f8be88c39
font_02_sfnt_off00013ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF7 18344 bytes
SHA-256: e66f1969e9be39bb5a57df0176f8a8f32687d732d844832750a6eda01b5b40e8
font_03_sfnt_off00016fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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