Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60e1f048dc3cff3…

MALICIOUS

PDF

82.3 KB Created: 2021-09-12 09:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 5f5033de2a5135a234e4f768f32759cc SHA-1: ccbed16ddb04f282f12cce829d13f218acc52054 SHA-256: a60e1f048dc3cff36ae6ebb5261d3ee161ecd67daef59f40c52a2c39c55ea9bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of PDF link farm heuristics further supports this, indicating the document is designed to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://giprozdraw.ru/ckfinder/userfiles/files/wadirifovesokovukima.pdf In PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613702d29673a---2519779048.pdfIn PDF document text
    • https://karaari.leaddeehub.com/userfiles/files/dizetezovosofujodiki.pdfIn PDF document text
    • https://hobbyschuurtje-webwinkel.be/images/userfiles/file/lejodinagagifadopapataxa.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/mawudefezomeribinifujetiw.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/vivuniw.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/24843472659.pdfIn PDF document text
    • https://marblo.marblobaths.ph/app/webroot/img/files/57263261847.pdfIn PDF document text
    • http://gaestehaus-am-erlkoenig.de/img/editor/file/wamid.pdfIn PDF document text
    • http://alcantara.cz/data/file/6965772841.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/52841413987.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/99664487125.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/fisafiv.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f87588e011---31763057700.pdfIn PDF document text
    • http://justsayhi365.com/uploads/file/51532670870.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/bowefizutamidev.pdfIn PDF document text
    • http://makaroma.fr/upload/file/39609791420.pdfIn PDF document text
    • http://luckysim.com/userfiles/file/rawegatanuver.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/95496348629.pdfIn PDF document text
    • https://exam11.menapoint.com/app/webroot/upload/files/xidep.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1612f039c1b93d---nupuzevanax.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/timipolutetajoloxudinom.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/lusemofowarefi.pdfIn PDF document text
    • http://rrmkaryacollege.org/rrmkarya/userfiles/file/tukifiriwoxagezogenino.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/86921688363.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/jaminunonevojefuw.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/18331809589.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=injustice+god+among+us+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_off0000ddcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E6 10984 bytes
SHA-256: ef8bd731cead20737773c9ae1c3b2e9e9a90eda82e06c5a9a2f8a0ff3e67fef9
font_02_sfnt_off00010f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F39 17104 bytes
SHA-256: 0c605b196086d1bb84090267ca8a30509d4039d53e3b55fd5ae635cde5ea482e

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