Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0c219c042d3850…

MALICIOUS

PDF

93.4 KB Created: 2021-09-13 08:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3951fb1f4832d0dbbad3624e5547be8b SHA-1: ca0a355df6875b73b34cf31a30bb61b6b574ac92 SHA-256: 2c0c219c042d3850964fe731be8b9f04e76f0b04c393af68b497da7942d02f44
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits multiple indicators of malicious intent, including heuristics flagging it as a payment redirection lure and a link farm. The presence of numerous embedded URLs, many pointing to PDF files on various domains, suggests an attempt to host and distribute further malicious content. While no scripts were directly extracted, the overall pattern aligns with phishing campaigns that use social engineering to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://rrarental.org/upload/file/xijuw.pdf In PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/sivafom.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/watewodojikajivav.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/22287198140.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/13243350774.pdfIn PDF document text
    • http://www.childofafrica.org/media/userfiles/file/82831401874.pdfIn PDF document text
    • https://tckontrola.hr/files/rixivozopoxedabeteroduz.pdfIn PDF document text
    • http://thcsnguyenvanhuyen.hoaiduc.edu.vn/ckfinder/userfiles/files/46276639332.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/jixafagekojupotoxusoz.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/39154265138.pdfIn PDF document text
    • http://ana-jsc.com/upload/files/53650057007.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/nujeko.pdfIn PDF document text
    • http://artospace.com/pics/file/89312195522.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b759818fe---89639152011.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/58865086973.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/72983224758.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/10052753123.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/27177381165.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/5036723355.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/kogabavegejavika.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/levazi.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/guwanodituzifodijal.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/tepezubiduveri.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/893b45ea6bb1044c4242f0440e7601c4/3870569384.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=alert+maker+apkPDF 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_off0001059e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059E 10000 bytes
SHA-256: 7f349565c1af1f05a1f8c06482a1dc4e2f87c2d6c3a92883b60bdbca980f6377
font_01_sfnt_off00011bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F0 19972 bytes
SHA-256: cb60f2e0263cd56ac34c38a23ec8e07dc64edc39ba3a9cc4636ca859f9a45e1f

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