Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2c10ecc3d335b6…

MALICIOUS

PDF

101.0 KB Created: 2021-09-03 08:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0d7ee3a6cc8acf4b4109bf22c86546e5 SHA-1: 266f713ba052c4612ac0e393a5c056093c30e918 SHA-256: 2f2c10ecc3d335b66a4f0dc9911b0b3c2ed437f9013dd715eacb5b6ddd2d62dd
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of external URIs and link farms strongly suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://inwebjor.ru/uplcv?utm_term=embraer+175+airport+planning+manual PDF link annotation
    • http://mazraeir.com/images/upload/files/daxadikebagi.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/94424092508.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/63289109465.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/61011572822.pdfIn PDF document text
    • http://vendingchat.ru/uploads/ckfinder/files/77829455877.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/2e4435532cd34605afef55cd3f74d874/30866695778.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/63405898701.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee2a51d9c0---bitufubekelusuwapigemur.pdfIn PDF document text
    • http://gdgom.com/upload/file/210724025938154151avd4lrk0ium1.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103c3546088b---79799461653.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/61076969366.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/03a4a0287e790722fc6095cd626507da/73927904974.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/78446874927.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/xobomezunibeziposomelif.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f529fa4ccc0---dopitininiwexajoga.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/45029524456.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16077420707835---68824346658.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/refemakezenagoporudod.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/keziserexojowiba.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4f5b1e6b9---98201915469.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/444gj0r07aam92m49bra4j5pcm/84621718018.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ac60d00b9---pamulok.pdfIn PDF document text
    • http://asustainable.com/global/file/33617278370.pdfIn PDF document text
    • https://folklorebridge.eu/uploads/pictures/files/67528999423.pdfIn PDF document text
    • 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_off000126f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F2 17844 bytes
SHA-256: 9903cec92a8ac94510eea18f2c61dc3630fe94444dec86eb82daaafa09d70e1b
font_01_sfnt_off000154fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D11 10884 bytes
SHA-256: f30e1aef57dafde6df71cc6218d06de516209fb08d8174f430ff84e7e369648d

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