Malicious PDF — malware analysis report

Static analysis result for SHA-256 322f98c568e869a4…

MALICIOUS

PDF

123.0 KB Created: 2021-02-21 09:38:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fae2e9eec97fdc597acb3b61b0f3bf33 SHA-1: 3457896db4896954a86f327fbc41f8d92ad20576 SHA-256: 322f98c568e869a4f4c5cddf6bcf1dd546685d76ffbb0d9fe8fe1ec89fbb17c0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many of which are dynamically generated or use suspicious domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly indicate that the primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=the+jordan+rules+book+pdf PDF link annotation
    • https://cdn.sqhk.co/wovegorarev/ihhj3md/raid_ant_traps_how_to_use.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/jc8KGTK/dusutaviraluzufezekuwog.pdfIn PDF document text
    • https://ramaxudefe.weebly.com/uploads/1/3/4/0/134042793/natirona-kelux-darinebitopeba.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/l9McibE/79674279715.pdfIn PDF document text
    • http://golomashvanna.xyz/72590695396pmnci.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/lajenumikik-wupobifewupaj.pdfIn PDF document text
    • https://simoreve.weebly.com/uploads/1/3/4/3/134370914/xitixolotesik_vorigonapoxas_gabixokofagopu_gumago.pdfIn PDF document text
    • http://help-violation.com/asme_seccion_viu7m5.pdfIn PDF document text
    • http://raifaisentgo.online/49614037660ixrxz.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/0hfX3sc/tewiwi.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/vufuzewasi/format_apex_code_in_eclipse.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/dekigujexijafiworawibode.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/ragiziwupagufim.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/family_tree_templates_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/javerikeg.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/funudosumaxetesiv.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_off00019f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F00 5356 bytes
SHA-256: ee86a33dd802264da1123ba7d546e5d3691060715d9ae786104cccf231baf23e
font_01_sfnt_off0001b12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B12B 13652 bytes
SHA-256: 295df262d9dc206c25aff537a3645023b7ff57bb10c0fb7868d6d6db0014c59f

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