Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7be8f9e5f4f403…

MALICIOUS

PDF

65.6 KB Created: 2021-01-22 10:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 51983d3290df4a3991e725354a294af2 SHA-1: 7d299a67ded075683c8a6b4be46ffc4ca2b6fb4a SHA-256: db7be8f9e5f4f403f0e1c23b535e80e1dc485aa1aa27fe4f6ad95a63fc48caf2
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains a large number of external links, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. No scripts were extracted, but the presence of numerous external URLs is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=camouflage+worksheets+for+second+grade PDF link annotation
    • https://cdn.sqhk.co/nazabimon/iAjdiiw/truth_or_dare_questions_over_text_generator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5fe117aa72614.pdfIn PDF document text
    • https://labufixurugon.weebly.com/uploads/1/3/4/8/134873424/56982271.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/GBygiig/screen_recorder_for_pc_filehippo.pdfIn PDF document text
    • https://guvoladedesu.weebly.com/uploads/1/3/1/4/131453897/5275315.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451556/normal_60062bc51eece.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365621/normal_5fe11851a938d.pdfIn PDF document text
    • https://romizipomubem.weebly.com/uploads/1/3/0/7/130775952/nedireteke.pdfIn PDF document text
    • https://linepapimufuto.weebly.com/uploads/1/3/1/6/131637640/vajodu-famojekoz-jalobawunotir-ditevesoxavu.pdfIn PDF document text
    • https://datedevob.weebly.com/uploads/1/3/1/3/131381982/8828728.pdfIn PDF document text
    • https://xelewutoritawi.weebly.com/uploads/1/3/1/0/131070131/519addb74e.pdfIn PDF document text
    • https://xumusozopojuvuj.weebly.com/uploads/1/3/1/3/131398507/d9f50bbff6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_5fd27fdf4752a.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/gGjfhgn/pioneer_of_modern_architecture.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443574/normal_5ffc3452c0bf0.pdfIn PDF document text
    • https://cdn.sqhk.co/kafevinuva/igiaCZx/10675504727.pdfIn PDF document text
    • https://bumokodujexub.weebly.com/uploads/1/3/4/5/134595190/mijaxi-sagoloso-lenon.pdfIn PDF document text
    • https://tegidaweriwasul.weebly.com/uploads/1/3/1/4/131483440/bacae1c95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424935/normal_5fd127fba153b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413468/normal_5ff41e070939c.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/gghihdt/talking_tom_and_friends_wiki_channel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC349 5496 bytes
SHA-256: 31df9771ccfcb073a27826307a1cf5e2e8412c0ad6697dbf6d1534a6f72384c7
font_01_sfnt_off0000d5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E2 10344 bytes
SHA-256: e0ec0ebee74c281a0e1c07c28ecdbd2f23c65e907a6298fc17efe3a47e087a1e

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