Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f230abecee0fb1…

MALICIOUS

PDF

78.9 KB Created: 2021-09-13 12:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: deb46c8801589c266b25fe8d66a14c54 SHA-1: 7e3d9e5cd3b4d7e370cb625d5627248ffb30400b SHA-256: 56f230abecee0fb101d95a7f4cb8bc8234f30fe0975ce5480db290442fabc4eb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable hosting and utilizing UTM parameters, indicating a link farm or redirection scheme. ClamAV and ML classifiers strongly indicate malicious intent, specifically phishing or malware delivery. The presence of multiple external URIs suggests the PDF's primary function is to redirect the user to potentially malicious content hosted elsewhere.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=dream+league+soccer+2021+obb PDF link annotation
    • http://borneneskontor-landsforening.dk/userfiles/file/xaxurubejunalaxefovegasod.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/nasevifinovewopug.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/wusuzewutabanunilaruzi.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/28522118633.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/wadiwidesi.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202191101525089.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/wivimosutabarawutut.pdfIn PDF document text
    • http://kamakuralosgatos.com/uploads/files/79468838481.pdfIn PDF document text
    • https://poulinstrapscan.com/userfiles/file/gobubivodalub.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210905_F27CF9B343A219EB.pdfIn PDF document text
    • https://ans5680.preneed91.com/upload/files/zamobonugudipoxik.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/72481985131.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/xamewanomidinido.pdfIn PDF document text
    • https://xistenze.nagydavid.com/files/files/5970962526.pdfIn PDF document text
    • http://ccadl.com/files/20210913095247.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/55a2ca044f309ef84c29ed2d78660d15/52176892763.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/84778114511.pdfIn PDF document text
    • http://mskabel.cz/UserFiles/File/57661487509.pdfIn PDF document text
    • http://aallergy.friend-match.com/upload/files/zuxawixok.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/dobedaxoziwobujuki.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612eac231d5e5---remosazavajane.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/44713208969.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/mevimosapulo.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_off0000c7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FA 19720 bytes
SHA-256: b26858af83c7122d35f0d071604b5b17a91c74b816586e3b216a1eafc02a0587
font_01_sfnt_off0000fb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB37 10812 bytes
SHA-256: 8cf39ccaf7e689d2f385b404c8a4c9b8bb6d0f02ea3c3491853f56fe4d6b72a7
font_02_sfnt_off00011447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11447 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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