Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c6291bb505d756b…

MALICIOUS

PDF

88.5 KB Created: 2021-08-14 20:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 872bda7d9af6573b21a6b3c3090f6044 SHA-1: 22a7442d0f0188cc489f1fbffeaf1462a0ada763 SHA-256: 1c6291bb505d756bdbea656e1f5a3b92977dfc45b748310e11422fab8c0d59b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a link farm pointing to multiple compromised websites, likely serving as a lure for phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/07927b475baa21cd9b9856c28b6f899a/kerunepipusatagovelikeg.pdf
    • https://canionglobal.com/FCKeditor/file/sosejodugekegewobe.pdf
    • http://tfforming.ru/d/files/furuxerag.pdf
    • http://filippodelvita.com/demo/userfiles/file/nadodomol.pdf
    • https://wecareprogram.org/images/file/97010880413.pdf
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/wolifav.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c2ab08a8e89c934f1991d3fa56222ad8/58176520871.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5972b02d0---16189119415.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cec197a610---87948747839.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01838dfa21---19067737521.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/943be8a2b3195ac46eba19daec524ce9/81805877753.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/pfsbhctc4b074gp52fr98ojtkk/92580192444.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95b7792ebb---wikap.pdf
    • https://stomatoloska-ordinacija-rijeka.com/files/vizesezilulerugolaluzati.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610a18ac3bb0d---73767537345.pdf
    • http://fasson.vip/images/editor/files/wuwimijus.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/b7199918a143f140a53115f782539d97/87935578235.pdf
    • http://fobas.cz/userfiles/file/xidedaf.pdf
    • https://drosamahetta.com/userfiles/file/lilukok.pdf
    • https://shoreluxurylimos.com/userfiles/files/zafofuru.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4ac5e7877---baruvuw.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b68ce44710---nokokirukemum.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=does+banco+popular+de+puerto+rico+have+zelle
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ab.bin
549bea59a3451dbb7634c85869a9356e597f20f7e96cf8f3024c7f9509d38c8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AB 18364 bytes
font_01_sfnt_off000120be.bin
ed1d2658485b21cb424fe360b6f556297c2af6af411ec5f4bd64ee903003c5f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x120BE 10980 bytes
font_02_sfnt_off00013a00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A00 16792 bytes