Malicious PDF — malware analysis report

Static analysis result for SHA-256 468766a613e473fe…

MALICIOUS

PDF

79.5 KB Created: 2021-03-06 17:19:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dee0a19a371ffc646686577e132b5193 SHA-1: 23237369018289d236ce34e644c8751c6655907f SHA-256: 468766a613e473feff45f63f0fad8f5e3812ee01fd26edbd7aca988a66e39e7f
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'packet tracer answers', suggesting a lure to a malicious site. The presence of ClamAV detection and ML flagging further supports its malicious nature, likely involving exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=4.2.2.4+packet+tracer+answers In PDF document text
    • http://hr-insider.com/nursing_physical_assessment_form_checklistg8elv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408873/normal_5fd2a8c2b8273.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411918/normal_5fcc36271e57f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_600b2b0e4da37.pdfIn PDF document text
    • http://optarfes.com/narigabezasukvcax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417222/normal_60298cf262e04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414491/normal_6025e71f32031.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/pigolo/nokogovarobitut.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/venus_in_transit_ielts_reading_answers.pdfIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_be23e4aa22c44c98a678cf50c3811119.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisazabe/gukedalewil.pdfIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_7056267850c84700bdcd55edfa03db65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/doofenshmirtz_meme_template.pdfIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_eb567ce5a99d46d3a6ac3f036942593c.pdf?index=trueIn PDF document text
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_9134ba90532c43b68d4034128dd08d49.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vosimalume/65343495397.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/66308103040.pdfIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_c5eff275f61e49aba0f8bb1d06435322.pdf?index=trueIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_e09f71b59d0e4b22b3c6e4faa81dfe46.pdf?index=trueIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_ff0bb2a0d7324f61889cc969a3908fdf.pdf?index=trueIn PDF document text
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_ef3bf5d85c004519a8e6ffc46a9f4ccd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woberiz/osrs_slayer_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/statistical_analysis_plan_template_ich.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/zigob.pdfIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_0ddff92a033c40339cce95018af421c8.pdf?index=trueIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_eaeac8ba483a41fa82bf1cb35845f322.pdf?index=trueIn 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_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 5208 bytes
SHA-256: b2b6aa30c8d48cdb125956e3b53cad71326c2819b12799e69942d7dc845b2f8e
font_01_sfnt_off000103a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A9 14156 bytes
SHA-256: 93e28c3772b9b877f38a736d02ea860060f30cf3dc8af5876821cfdbf25d12b4