Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce08f6827b9ce486…

MALICIOUS

PDF

85.6 KB Created: 2021-04-04 14:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: afcf4dcc9dc9f80ab0eb0d0235763519 SHA-1: 19bb0a31e4882e20b9df14b46b67c3b075613dbd SHA-256: ce08f6827b9ce48689de0e982c97cab723b7c14c40242e613c227575e16cd3d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/wix?keyword=manny+pacquiao+fight+live+stream+free+reddit PDF link annotation
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/vomaluli-boduf-senefaxivefom-zumerajejuje.pdfIn PDF document text
    • https://jovusejafuraz.weebly.com/uploads/1/3/1/8/131856080/2641052.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/jddI2ig/spirit_halloween_2020.pdfIn PDF document text
    • https://kuvixirizu.weebly.com/uploads/1/3/0/7/130739951/da325219b.pdfIn PDF document text
    • https://jonaditogun.weebly.com/uploads/1/3/1/4/131408899/wazedukoxojexevub.pdfIn PDF document text
    • https://voteweze.weebly.com/uploads/1/3/5/3/135346586/dokufutoxomik_busifasudab_tiruwe_sowitebu.pdfIn PDF document text
    • https://rifuxegu.weebly.com/uploads/1/3/4/5/134525143/aa1e24e25d.pdfIn PDF document text
    • https://zizujegaduxopur.weebly.com/uploads/1/3/5/9/135972979/1319952.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/redulejorijaduxilixuxidiboden.pdfIn PDF document text
    • https://wujatukeki.weebly.com/uploads/1/3/1/8/131856991/e618519efa05a.pdfIn PDF document text
    • http://quickpapp.online/chamberlain_wireless_keypad_klik2u-p2ogmvh.pdfIn PDF document text
    • https://cdn.sqhk.co/pulafefer/J1jgMgf/mountaineering_boots_for_wide_feet.pdfIn PDF document text
    • https://vetubopovitomux.weebly.com/uploads/1/3/5/3/135311090/9457327.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lakadutof/77157352820.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/goroxaradu.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/dironobopi.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/hayward_pro_logic_salt_cell_calibration.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F73 5864 bytes
SHA-256: e9d3d0c551b4dbba63731d1d270d4303443366c2e1e7e89428e506e724bf15e0
font_01_sfnt_off00012355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12355 11452 bytes
SHA-256: 574359228c69db52ed6f0a5f4b9b6e819a1c0592095cc311e1ca76d78fe04626

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