Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b3f9096ec58c29…

MALICIOUS

PDF

98.5 KB Created: 2021-07-29 20:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bda392817ce1691b7493d5618b1f6d44 SHA-1: 1ecb7da5c076ddfc5e3ff3c29ad77c862a271e41 SHA-256: 85b3f9096ec58c296260f84e7ede4e4a2d2b0b7f8db76a2c7e0bbee071cc7aa9
196 Risk Score

Malware Insights

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

The sample was identified as malicious by a ML classifier and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links pointing to various domains, many of which appear to be disposable or compromised hosting, suggesting a link farm designed to distribute malicious content. The presence of these links and the nature of the detected scam lure indicate a high likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://infrive.ru/uplcv?utm_term=law+of+property+act+1925+section+184 PDF link annotation
    • http://nhadep30giay.com/uploads/image/files/15255689272.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/49198307911.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/suluxorijade.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/bi85ci9gt7qbp9779jq93fiht2/19662860029.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/vavagepizupetegikojotexi.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/63145026482.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///56110961508.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/24663837562.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16075e7710f97e---nilorefijajobobo.pdfIn PDF document text
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/21888097355.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d761c8d80---velexeta.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/1jfja8onkqndv8i9f32on0v0q7/xokejasebanodeg.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/zureniderijazexubijisax.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e79389d6c---dugeni.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/busosusinize.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/690ef6f3aba103e212a0ba97ba00eefa/wuxisorawidugenadutanu.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/8b5e493e4fbde3ec4bf09511e18ea8e0/tolezigojisudosomojasodas.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb07fd72a7---mufofexibataxevi.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/49341277490.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/xumib.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/47200843870.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/godiwofesa.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/pevobuzur.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/51aaf35a365c5805ad2c17d8f0a669af/solidenorebozi.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160738a23ea571---27222162139.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_off00011a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A46 11344 bytes
SHA-256: 0180a88d41c3db4a5777eefe2b95cddc78c113be560d5d444efba83f9cfce12f
font_01_sfnt_off00013562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13562 17296 bytes
SHA-256: e10a0b7f7f614b06cb2408b0fc9196a12b3ff4053bb312bad591049a53f498d0
font_02_sfnt_off000162fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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