Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a2128a18b58807…

MALICIOUS

PDF

83.1 KB Created: 2021-09-19 00:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9fc116d1dddc26e0e11d77af725078d4 SHA-1: c82489cd66797b1a9faaf4d5e74ac0ecf4e71f6a SHA-256: 47a2128a18b58807bbb6c260c59085ca8654507bb9ee90331cc1554b8773a128
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The heuristics indicate the document functions as a link farm, directing users to potentially compromised or disposable hosting sites. The presence of numerous unknown URLs, many hosted on what appear to be compromised CMS uploads, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://sabagdasarov.ru/upload/file/lukipaleselosewa.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161325fdb92dcc---36201231385.pdf
    • http://xn--80aer5aza.xn----htbdepbihnfb8cyg.xn--p1ai/ckfinder/userfiles/files/46499361766.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613882d1ef24d---gidinagiwub.pdf
    • http://studiotecnicopetrillo.eu/userfiles/files/4275175864.pdf
    • http://tuning-zone.eu/userfiles/file/vavulubosefi.pdf
    • http://ccadl.com/files/20210906014338.pdf
    • http://deauville.ru/files/file/86532850192.pdf
    • http://dgone.kr/userfiles/file/20210917134123.pdf
    • http://kramnyca.info/img/upload/editor/file/12922611555.pdf
    • http://ccforum.kr/uploads/file/1631787733.pdf
    • http://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/pitegolumil.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/vcs6b5gd91qqigp1e97l48ofun/wimaboletedug.pdf
    • http://autowassenindex.nl/images/uploads/wamemosojez.pdf
    • https://idd.no/ckfinder/userfiles/files/lupaxofepuwunorozul.pdf
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/96811289570.pdf
    • https://linker.tw/files/mudapepopumorujekira.pdf
    • https://skywaynepal.com/userfiles/file/wiwovunonefunuvoriwolapuw.pdf
    • https://bawaniint.com/ckfinder/userfiles/files/30932049247.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141dabed17c5---jukiwunotuji.pdf
    • http://exima.kr/userData/board/file/butiwedi.pdf
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/wigupupavobixefuk.pdf
    • http://lovepetclinics.com/file_media/file_image/file/bovuzeguretig.pdf
    • https://stallion-international.com/userfiles/file/26148292275.pdf
    • http://355353.ru/userfiles/file/nezizuxuzidurasiwegag.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=scan+qr+with+android+camera
    • 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_off0000dec1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC1 16792 bytes
font_01_sfnt_off0000f6d8.bin
3c07e35e7d7cf117ab73b04c3393d55c7aab6646e149bdcc8592b0b35b3bb334
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D8 10728 bytes
font_02_sfnt_off00010f2d.bin
62c335afe6b447210b252962dbfdd2b080bf3bd24cad126f80c14e0c42e46d91
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2D 18296 bytes