Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc2597dda4c35e3…

MALICIOUS

PDF

68.1 KB Created: 2021-09-26 07:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5135aaa6bb031efe3db79ee15b25d160 SHA-1: 834561bbb54c5abd799adb28f2331dfdf3de4005 SHA-256: 0cc2597dda4c35e3a782e9be20bfb1826b4e06f703d3e74d1d9708699b3592cb
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external links, with one heuristic specifically flagging a link to 'http://carraracucinecomponibilitrapani.it/userfiles/files/jadep.pdf' as a high-risk random URL. Another heuristic identifies a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing lure or a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://allytemp.ru/uplcv?utm_term=beauty+plus+meitu+camera
    • https://kocarbon.vn/luutru/files/siminuzoxerepe.pdf
    • http://adirondackseafood.com/ckfinder/userfiles/files/34606918096.pdf
    • http://aow.infogestnet.it/ckfinder/userfiles/files/zupukudigalanave.pdf
    • http://robertoantoniz.com/resources/original/file/wujabugigirefexaxefisa.pdf
    • http://emanuelarombiarchitetto.eu/userfiles/files/revurifonujope.pdf
    • http://cpils.com/userfiles/file/pujexatowufinifonafutoli.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16139c3dd77a5b---11434522364.pdf
    • http://travelbilet.ru/sites/default/files/file/vidaxaguxexisolomib.pdf
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/rexuputemarokabejezevo.pdf
    • http://stoka-saarlouis.de/userfiles/file/gebim.pdf
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jovisugujerinufolapelawus.pdf
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/nosakopovokupiban.pdf
    • http://carraracucinecomponibilitrapani.it/userfiles/files/jadep.pdf
    • https://pqclass.kr/imgs/file/nimikonivedalu.pdf
    • http://home-hj.com/up_photo/file/dojawiwomarerugudi.pdf
    • http://medeeatour.ro/mm/file/polox.pdf
    • http://jinruily.com/UploadFile/file/20210926053154219.pdf
    • http://harc-ias.vn/Images_upload/files/5430882182.pdf
    • http://evo-models.com/uploads/userfiles/files/66700570187.pdf
    • http://skpizzasubs.com/uploads/files/darudosonirafojan.pdf
    • https://losungversorger.com/product/file/sowugotabi.pdf
    • https://muahohangnhat.com/app/webroot/uploads/files/kizigo.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/65c009449a63ed0fd019a37539052450/vodaduvi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad39.bin
484383778f7505a1ac93b6fbb9a2db48ff6bfe3ca7bfaa7ff8132cdeba0a0233		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD39 14636 bytes
font_01_sfnt_off0000d11d.bin
426f5aedc3cacfaf7f0f12aa41ea60f3868b0da1c3c1f55a2d80ecf85a8f1b57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD11D 10576 bytes
font_02_sfnt_off0000e956.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE956 16792 bytes

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