Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c47bffb1c3b209…

MALICIOUS

PDF

80.6 KB Created: 2021-09-01 09:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9e3dd2fa2b6d3a5bb27fd687f71bd547 SHA-1: 45ed82c8ccc02d9820c5b8765b4788be1d9d4fde SHA-256: f2c47bffb1c3b209a108422c8c2e136aef289eaaa4d362e0a12d52acd1ac9d52
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://classicalgardenstatues.com/uplds/file/waneginugomupasexefoxila.pdf In PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/38441687651.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/darum.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/moluboguvaduregugadol.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efd6144c3ec---minufubupanukipiragana.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/7d143f36690da744c76ab5f5074bc6a0/motudosis.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/29845136435.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/22436031967.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/5da85814b114a5e2598da6e1e3e3f712/jumipap.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84690ab87---68593084998.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/92c6b58fac2380b8d5471b7495fada68/27315752626.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/09v9rqe1s3vmj8rl5iin23rqq3/ranivasezesegafimu.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160943436c915e---zexilafumunep.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210505191943_1122252670.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/bosefarazumiro.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/korovujodokunowiwibijas.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b08b3cffe---kizipizuluzu.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/kikedonobe.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/tovufobepotimom.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbd19eca89---xoserivomemisakarovof.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160760a60ae66b---71350759449.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/muzamuvudedubiborelanase.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3b1835468---67686716756.pdfIn PDF document text
    • http://upsshop.ru/ckfinder/userfiles/files/90893664698.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/76186629870.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=math+with+mePDF 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_off0000d7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF011 17624 bytes
SHA-256: 704144b607bdbfc747c7bc4e1b6188fdc4b6c1d6563ea71864ed3f8ba3e5d054
font_02_sfnt_off00011ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE4 9916 bytes
SHA-256: ee5fa24b8202b400d97d1eedb44858a8ae7bf763d240fe20519b1a805785cc10

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