Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed8c0472b0565cd…

MALICIOUS

PDF

75.7 KB Created: 2021-09-15 18:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 63889706558a9d636784a8fd0199ffa8 SHA-1: c74f0625b7ffe19904a881022748956e4fcdaa56 SHA-256: bed8c0472b0565cdc2d6c2717a807128adeae7f519cf94a4d622cf985e30c337
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure points to a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • 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://woori-tour.kr/FileData/ckfinder/files/20210915_9399941522C3C01F.pdf In PDF document text
    • https://alummaswaja.com/yii/sdbalikpapan/home/images/upload/files/kejudezuziri.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/fotimunisebiko.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/mezudexojelipitofet.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/mememolami.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/77947393429.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4d61cc9f08c14e94683d16c3049f7aa8/jemumapokamemupapifujotim.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/35788347718.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/zuwiz.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/sopijusede.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/265253044.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/74609109355.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161334a95832ad---nekutifuzexagigidekozuni.pdfIn PDF document text
    • https://proia.bg/userfiles/file/nexaperizepuxa.pdfIn PDF document text
    • http://autoachtercamper.nl/userfiles/file/paluzesof.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/satisaketakaj.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/rofonopofowamar.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/liremewosadedeb.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/57616067786.pdfIn PDF document text
    • https://stthomasorthodoxchurchsouthpampady.com/userfiles/file/22399951444.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/zekogexisuralax.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/8bc1d023dd973d50772fd3c960295a05/13873686854.pdfIn PDF document text
    • http://idcla.net/upload/files/jajilega.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/95854049972.pdfIn PDF document text
    • http://dubilex.com/userfiles/files/fagizudusewutepizizerotiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+hack+wifi+password+with+wps+wpa+testerPDF 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_off0000bfe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE0 10736 bytes
SHA-256: a4f787a2a453d0e781cae230bbde11f15f29468cdf1dc97c5bb30d2a91b3951c
font_01_sfnt_off0000d8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C1 18412 bytes
SHA-256: a3a2d7b15e2cf78f17b064ab5368160d809a2f99995004272038cc0e653f58b2
font_02_sfnt_off0001089d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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