Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9f5c2ede82dac8…

MALICIOUS

PDF

83.4 KB Created: 2021-09-06 22:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a3c01e055ae767d67845afb4437770bb SHA-1: 3e918a56e15485a13b18f6d9cbcc16cf018bf490 SHA-256: fe9f5c2ede82dac8dd4fc7007ab7b999bef2f01c6aa1ca59d85bed9ca075f90a
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable domains, which are likely used to host further malicious content or redirect users to phishing pages. The presence of link farm techniques and compromised CMS uploads strongly suggests an intent to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/1nlah22k7oidijnch7jgaso032/loxuforifoluwijederilog.pdf In PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/o5vt8qfgoadbd4hja1b24asen5/8733115214.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/49972650010.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/lonekizupibidosulo.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/visikajaziwokuxetove.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087b294ed9ce---sesovofiparutazeluvaj.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec5124d49f6---nalojom.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/roburiwevaz.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/p2giaasolaip7r12heevc95vve/zudisuduvokugogilofafevi.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/21960065720.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160e79e68a1840---15444493934.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2198ec317b---zoxobejora.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/39136295491.pdfIn PDF document text
    • http://klinok-saintp.ru/files/senuzekewakubosupivavuju.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/jatewibivug.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/95011201294.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/mamagikokogejazama.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610fe279be193---dijaxobixiwawinamevopi.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/kilarevumabojafu.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701a81814f5---64897921152.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210617142703.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/vuxuvekobesatup.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/61464404874.pdfIn PDF document text
    • https://airshow-bg.com/file/pedukuxumol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=afghanistan+a+military+history+pdfPDF 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_off0000dc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC58 18732 bytes
SHA-256: 2f50ff70ed3bc038168b68dedebffdfdf441586b959e882d87268435a05f596a
font_01_sfnt_off00010ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE1 10908 bytes
SHA-256: b31df358ab3c4cc4ccb026b7ce2fae8c2803d9be312400b0448b7d65fddde06b
font_02_sfnt_off000125b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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