Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce67596e1aec24c…

MALICIOUS

PDF

91.3 KB Created: 2021-07-13 19:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: bba6072748d01ef67ad5ba15808a6c21 SHA-1: b7b4ba14b64adca5a1823372cc4634cb01924696 SHA-256: 9ce67596e1aec24ce560ab14e6d2c9bd6efb592afe9d0a91ea5bb6e9f265ba40
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is unreadable, but the heuristics and URLs confirm a malicious link-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://mizuho-co.net/file/ck/files/60007045109.pdf In PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/gozuzogat.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607ada156a752---57390030025.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/47706038858.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/70208422235.pdfIn PDF document text
    • http://famillespourstarlight.org/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/74452523514.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/4240df183abab5859ac76c4489522d3c/15414358477.pdfIn PDF document text
    • http://rld-carbon.ru/file/10398009623.pdfIn PDF document text
    • https://studiorampinelli.com/file/93228237238.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/zopupap.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944c2fd44cf---1806660500.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607763759d469---veludukekojomug.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/61b8176540d89f443c26e2f369103b1b/1615286457.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/96973077011.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd49d29d2a---62569798052.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/98832237435.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f53f559728---37700933791.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/77097252052.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/rawamilo.pdfIn PDF document text
    • http://altinay-law.com/images/file/tixubirovegozimojorapinun.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160794bbfeede6---levebutowapewediga.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/87346895521.pdfIn PDF document text
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/92123649356.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/3fddd2187f893141a1a0d1d8fa1d4d11/62163144164.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b5832b106e3---30819887581.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/68180791618.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+get+money+fast+in+sims+freeplayPDF 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_off0001013d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001194f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194F 17192 bytes
SHA-256: 911e1b5799c2027de639088ef2b68b0e774e2d50855907a9d319cf762b69ea6b
font_02_sfnt_off0001462e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1462E 10892 bytes
SHA-256: 36e609832a8c4b62485d07de438b83802a430fe787fec02913da5da8c6f4fa13

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