Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e6113d79c57564…

MALICIOUS

PDF

68.7 KB Created: 2021-09-03 21:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2965d4d5532c6508d4bc0fd111199909 SHA-1: e377ba47b8d1a8ca472f3484c765c3c7365632f2 SHA-256: c2e6113d79c57564b9670d32c57440c1ef65b14d895051d6322cf43874215cc6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The embedded URLs and the nature of the link farm suggest an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://matchedtubes.de/userfiles/file/wuniwajositovufi.pdf In PDF document text
    • http://op-gold.com/ck_image//files/33632844365.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/32503437537.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/xifeleforibetamiwuruvos.pdfIn PDF document text
    • http://ljjxmining.com/uploadfile/file///2021090102023513.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/14648182858.pdfIn PDF document text
    • https://rm-parketi.si/uploads/89964932754.pdfIn PDF document text
    • http://househouse.it/userfiles/files/tuwapujor.pdfIn PDF document text
    • http://balbu.hu/uploads/news/file/gudalosumuwamaboriboda.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/vav6otp88iodiedfpp6l0bp28o/63682766004.pdfIn PDF document text
    • http://gyuco.com/uploadfile/files/20210812_120053.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/daxogilizexopoluluved.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d9044bafa---nigadedokiv.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/72702061437.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/sekakem.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070519f9b2be---tejagujom.pdfIn PDF document text
    • http://montesantangelo.it/files/files/65665464389.pdfIn PDF document text
    • http://tano-cable.com/d/files/dewosirisimam.pdfIn PDF document text
    • http://celesteandtorsten.wedding/images/file/xugepakovinediz.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6417180c9---tusoweletej.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/bemop.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/bevejeruwaledizuk.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/95048266121.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608389af6d2f9---22970905295.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cc17b0fb5---vusitas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=manual+coil+windingPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB313 10224 bytes
SHA-256: 06ba3bbd28a3ff40039230b50f0856e49ef13b6f1dc56558df29884fc65273df
font_01_sfnt_off0000c9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E4 14336 bytes
SHA-256: 165644d52ea43bbdaf23a7666c2f0eb643cba34845354848b48f7b3bdccea742
font_02_sfnt_off0000ed70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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