Malicious PDF — malware analysis report

Static analysis result for SHA-256 7044762742d7555c…

MALICIOUS

PDF

85.8 KB Created: 2021-09-12 11:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b7d5144f3d74c87cd171b83769305dcb SHA-1: 69e15e94b2fb9f2371aed6e4565cfc8f62839051 SHA-256: 7044762742d7555ca2f9dff3442b7195eed7e793fea360949e7090a822f3a237
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised or disposable hosting, suggesting a link farm designed to redirect users. The PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristic indicates a tactic of leveraging compromised websites for hosting malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://priscar.com/documents/files/88226495296.pdf In PDF document text
    • http://mikomisushiwc.com/uploads/files/3246423044.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/jidaxotolajuvizeve.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/volumumufemetiwevurojakax.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/81049205685.pdfIn PDF document text
    • https://kaskad-74.ru/images/uploads/25300267217.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/nidodamudeganetilu.pdfIn PDF document text
    • http://freeorden.com/media/file/38859093467.pdfIn PDF document text
    • https://auto826.com/uploads/files/sepokoravibagurix.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/53287955076.pdfIn PDF document text
    • https://projektovanje.info/userfiles/file/penuzig.pdfIn PDF document text
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/66066675690.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e5ed664569e49db239e6d2ea06abefa3/26875841292.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/rakobusejirokowiromirofuv.pdfIn PDF document text
    • http://marklaliberte.com/fckupload/file/47523163498.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/2507971347.pdfIn PDF document text
    • http://jlssj.com/qianzi/upfile/case_editor/file/zalufezumixevijirolitan.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/5230e24d9965613e74873c1187df66bb/webubilijowudipi.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/lupebo.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67448802803.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336ea946901---29343381341.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/41079417927.pdfIn PDF document text
    • https://copacndg.com/images/uploads/files/79215198062.pdfIn PDF document text
    • http://rrarental.org/upload/file/tefemejon.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/c11d038ee253cc366a55dc58e854ea00/zodawofefimawimapeki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=game+bots+for+androidPDF 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_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 16752 bytes
SHA-256: 8b3a00f0b29f50d56af21468c70072bd56ab5e80f4ff56b3f1cb941b9bb24e15
font_01_sfnt_off00011953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11953 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001316a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316A 10648 bytes
SHA-256: 672f5e4f2ac143f0d65a2aadff929648da0caa7aff5bc34f7327531dd24b37ce

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