Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00f907cdf017ca3…

MALICIOUS

PDF

74.5 KB Created: 2021-05-21 21:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 81e98500c2f2b16b10a5718c41aa2083 SHA-1: 951fd4a7cf732ef9a80918d6e3ad707885e52353 SHA-256: c00f907cdf017ca38fe21ebb817d869dc2f3315123b29982cb3c4aea68af4233
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 0.9998

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://fokemale.ru/strik?utm_term=mortal+kombat+x+android+koins+cheat+apk+download PDF link annotation
    • https://bovopoboj.weebly.com/uploads/1/3/0/7/130776351/wogosesurajono.pdfIn PDF document text
    • https://tulofezufiruz.weebly.com/uploads/1/3/1/4/131409090/782835.pdfIn PDF document text
    • https://xasatodifugo.weebly.com/uploads/1/3/4/4/134439571/wusolane_derizanino.pdfIn PDF document text
    • https://wabumixa.weebly.com/uploads/1/3/4/5/134585451/5089321.pdfIn PDF document text
    • https://vapevaka.weebly.com/uploads/1/3/1/4/131407737/1fbef236d5e4a.pdfIn PDF document text
    • https://monemoret.weebly.com/uploads/1/3/4/6/134667898/karimuriz.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/fezubi_zusuwodivaj.pdfIn PDF document text
    • https://puxolulif.weebly.com/uploads/1/3/4/3/134356270/5f798583.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/zupenafud/table_html_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/aptitude_test_file.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/gosorekiweg.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/yard_machines_21_lawn_mower_140cc_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/matirepiwufuputon.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/xeraso.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/wire_haired_dachshund_shedding.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/what_supplies_do_you_need_for_cricut_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/do_you_have_to_do_morning_pages_in_the_morning.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/pupizojasisiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/answers_bible_curriculum_2nd_edition.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_off0000e6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 5680 bytes
SHA-256: c73827c8a4f5787413511cd3d05a769cd6da6a5265969f60baef5892489706d0
font_01_sfnt_off0000fa3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3B 10040 bytes
SHA-256: 444da3ed3fcd3e377f73d828de2cda736a09802e294e1a95b4356527ce612dd2

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