Malicious PDF — malware analysis report

Static analysis result for SHA-256 68afa46c9b37e6fd…

MALICIOUS

PDF

82.6 KB Created: 2021-09-14 13:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 43fe20028d5cea639dbca1eca7e85d49 SHA-1: 10ff4bf70637493d0ec5d3d54701a5dbadd32a94 SHA-256: 68afa46c9b37e6fd9486bb4d02b09b40936cfdb620a1c1523653f0483b0845e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains or compromised CMS upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery. No scripts were extracted, but the PDF structure itself is designed to lead users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=download+june%27s+journey+mod+apk PDF link annotation
    • http://escuelasfutbol8.com/docs/files/watebuxopesagajedolatajo.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/79207844705.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/1707990510.pdfIn PDF document text
    • http://gzbaosui.com/uploadfile/files/texuxarofuxan.pdfIn PDF document text
    • https://www.huaikrachaohospital.go.th/assets/global/lib/ckfinder/userfiles/files/xeganuvosa.pdfIn PDF document text
    • https://natinsel.com/imagenes/file/48084377279.pdfIn PDF document text
    • http://gibisch.org/files/files/35949297339.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/12910384054.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/govuw.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/5621800242.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/kidod.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/kogawuzaweruvatut.pdfIn PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/84116529928.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/dixuxinanone.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/xadikirulim.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f72989ff4---bagefoxadi.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/59492189.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/samazulesasegoxiboviduw.pdfIn PDF document text
    • http://dpsnowodworze.pl/userfiles/file/90256344739.pdfIn PDF document text
    • https://beautydent.hu/editor_up/69875009759.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/94ab758489612fde313189e86de3012b/togojabowed.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/jitudanejivivoxarezusup.pdfIn PDF document text
    • http://webursitet.org/Files/file/35655249399.pdfIn PDF document text
    • http://orosweb.hu/userfiles/file/vosovadutofarojotaxijine.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/5cmjhs7omlgdkt0t2o363mccdf/42582714472.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_off0000d908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD908 10920 bytes
SHA-256: f8930b55b8c3c2080cc6267967d88b3459fe1536dd935cbcfbe3f0cf1b4d120e
font_01_sfnt_off0000f273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF273 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A85 19280 bytes
SHA-256: 670f3add482de7dd7428edddb8e2373e1b602691de6ca94e863f98f960bceeef

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