Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafcaec616018dd5…

MALICIOUS

PDF

70.2 KB Created: 2021-09-26 19:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 25f598922c252eb9268103a305b735ff SHA-1: e51d071f2239cacf0f8b8cce393eb2b0139aac5d SHA-256: eafcaec616018dd52e85006a75f99aceaba1e73ac8ffb4d50d10800ac08dee77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents that may leverage embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://allytemp.ru/uplcv?utm_term=spiderman+3+psp+android PDF link annotation
    • http://zimmerei-possert.at/46288289008.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/pupezatuwosowo.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/46918520639.pdfIn PDF document text
    • https://dptech.vn/uploads/files/2013868765.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321946831f0---82919168186.pdfIn PDF document text
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/32133271952.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/nafaxuvifiluzoga.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614bf55777fb2---dixukuzokerixaj.pdfIn PDF document text
    • http://szigmetal.hu/editor_up/69620239634.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/25796376451.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/74530474661.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/vetow.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/lonab.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/7945d9a8f16c6c3f0ec5d62200a784d4/zaxefibokuxivurexel.pdfIn PDF document text
    • https://telorgabus.com/contents/files/14880723253.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/a0440eb123471d7abb1de2d6e3277355/gorofimoxin.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210906080653980.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/3afba306afec405355d6c997d42e3c12/babugejajozopirakuluru.pdfIn PDF document text
    • https://pgprojekt.pl/Upload/file/safokobonigumi.pdfIn PDF document text
    • https://isigakizima.net/img/tmp/file/31318707078.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/pabupepor.pdfIn PDF document text
    • http://ristoranteyuri2.com/userfiles/file/20027923882.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/59479651822.pdfIn PDF document text
    • http://soc-in.com/data/media/files/10341836666.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/79904846590.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/65441428889.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/m9n742sdmfhh3vvudlfb8aucs6/93413625755.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_off0000b580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB580 10656 bytes
SHA-256: 2694964ae0c35a90a703419ace6663a37cae0f532de26949d12ea584fb53a688
font_01_sfnt_off0000cdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DE 14852 bytes
SHA-256: 9aef661d5b6411222c81c397e5290a879be2fd10c30f78bc17c8dd4f7019ef4a

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