Malicious PDF — malware analysis report

Static analysis result for SHA-256 b08006cc4d250dd2…

MALICIOUS

PDF

98.7 KB Created: 2021-10-06 11:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 7ed6e9e2e79f83200af1166edb30b08e SHA-1: 1b8d764312ef5d4ca38ee02c933b68b3879d536e SHA-256: b08006cc4d250dd2ca5b778fde7a684ca7a9ab042cbac8a3197bd0f8c617304f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan delivery mechanism. The presence of embedded JavaScript (T1059.007) suggests it may be used to redirect the user or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://plentis.eu/ckfinder/userfiles/files/14507044584.pdf In PDF document text
    • http://crmrealty360degree.in/ci/userfiles/files/71383469959.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/nisako.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/sejodobisegali.pdfIn PDF document text
    • https://serka.com/serka/upload/files/39239262068.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/96476041390.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/55727275165.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-9-15/20210915143502840275.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/tanubijuwabewepitezoboz.pdfIn PDF document text
    • http://speckrepej.com/upload/file/pakuvexelarozaf.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/56754628698.pdfIn PDF document text
    • http://nantong.chinatupai.com/web/js/ckfinder/userfiles/files/nagekufepizo.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/21327786018.pdfIn PDF document text
    • http://jin16888.com/userfiles/file/12524787444.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/93454782937.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a6fe6a89ad---31231655740.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/39260355667.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/51180539820.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/kamatejoxu.pdfPDF link annotation
    • http://www.buildonhope.org/file/58420367290.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/66878291713.pdfIn PDF document text
    • http://indigobaby.eu/upload/files/vulinepemabimaduduw.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/12471620037.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/49799993636.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/68649781280.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=you+are+the+god+of+awesome+wondersPDF 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_off000116c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDB 20960 bytes
SHA-256: 90f808bd140d31b14d8cc350c97d67606a9112f1b3872c5f4c6d651078e66a23
font_02_sfnt_off00016464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16464 10832 bytes
SHA-256: a32ecf2f6fa8fbe59dc3e64275549d3db8af4f9af13741363fd421f82437e240