Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47c66b3b166912b…

MALICIOUS

PDF

76.8 KB Created: 2021-09-07 22:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 84a01ffa4bc7daf9bad45beb88bb9c4e SHA-1: 9114ad45a7febbe08edf6e3f283444d4710b2c7f SHA-256: f47c66b3b166912b4c99361b5be48e96d98d1ee745b504478f69ecb6b98ec567
176 Risk Score

Malware Insights

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

The file is a PDF that contains a large number of links, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a QR code lure suggests an attempt to trick users into scanning it with their mobile devices, likely leading to a phishing site or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/485208054662ffd4f31fc747187d9914/77453830946.pdf In PDF document text
    • http://tonyprins.nl/images/uploads/file/58623812491.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/35523669550.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/rl65t3il7egng4651p8k7q5qoh/dorebav.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/fifagexuji.pdfIn PDF document text
    • http://mhs69indians.com/clients/864804/File/pazebi.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf6e554b6c---feberive.pdfIn PDF document text
    • https://negaratoto.com/contents/files/detuw.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/22c8278493aa3b456907c7115e0b2751/32766397767.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/f74ad031140b259d9db5335316f17f8b/tujel.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/pml2pu2tb0esk8sn1uvvnosd7a/tofoxorisepevezugajaj.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/27053981174.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cefd81e095---17031261550.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/vojod.pdfIn PDF document text
    • https://ksuskalology.com/images/file/fesokaribi.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160846deab72af---33916144973.pdfIn PDF document text
    • http://khmim.com/ckfinder/userfiles/files/76796400347.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/43389025006.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/kovabidosizakirus.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/sejojupodumudarepejoxexon.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/fisetavakixolasaso.pdfIn PDF document text
    • http://thepnguyentran.com/media/ftp/file/82522063008.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/c7e9066b5bfb39758b17c8e8f8e1df3e/terapesu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=synonyms+worksheets+for+3rd+gradePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AD 11200 bytes
SHA-256: ccf1b3a30d886ce0e3b87212294ad8a45549a575092d4b6912e40c092842d26d
font_01_sfnt_off0000e09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09D 17268 bytes
SHA-256: 973bcb1580cf19c2e42c67ae7f7b7e75762c5fc0794e3ff134398f074fc82a06
font_02_sfnt_off00010d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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