Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2434166c3320184…

MALICIOUS

PDF

77.1 KB Created: 2021-03-18 00:21:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: abca8fbfd7967eb2701add8d7335e7a7 SHA-1: 7ea3fdb03fe1f81509819f36cf28715863a646e0 SHA-256: c2434166c3320184201c53254ecd7779e445cfac319f22bde882b4c3405726d2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a lure related to technical manuals. ClamAV and ML classifiers identified this PDF as malicious, specifically as a phishing trojan. The presence of embedded links and the overall structure indicate an attempt to direct users to potentially malicious external sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/aws?utm_term=agilent+1100+hplc+autosampler+manual PDF link annotation
    • https://mukuriwubi.weebly.com/uploads/1/3/1/4/131483253/jajufosonetalu-jituzemozaxifil-rekufijegeti.pdfIn PDF document text
    • https://bopevifobomamak.weebly.com/uploads/1/3/0/8/130814579/xabalikesabutevipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_6044d860d5530.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/86198882336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481406/normal_5fd377c6d9cea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449766/normal_6009111fb4bac.pdfIn PDF document text
    • http://rujawobezixevib.iblogger.org/vubalosarid.pdfIn PDF document text
    • https://wininivawad.weebly.com/uploads/1/3/1/4/131483201/pakugazige_pedemoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409254/normal_5fcbd4789eda7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490273/normal_603b637f01484.pdfIn PDF document text
    • https://lasarowolu.weebly.com/uploads/1/3/6/0/136024073/dopesodo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/what_to_do_if_you_want_to_get_married_in_court.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/67236192417.pdfIn PDF document text
    • http://fokugogubegu.rf.gd/basic_english_learning_worksheets.pdfIn PDF document text
    • http://xatabiraluxuded.rf.gd/wimoj.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/molevimoxif.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/rifededojirepetopuku.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/student_achievement_awards_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/13271132198.pdfIn PDF document text
    • http://sadoboxijowem.myartsonline.com/25824269255.pdfIn PDF document text
    • http://zilisugifep.epizy.com/matlab_plot3_color_gradient.pdfIn PDF document text
    • http://lusajafimaneru.myartsonline.com/unit_6_geometric_proof_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/bench_press_form_arch_back.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AA 5412 bytes
SHA-256: c7ec37b6172dd006f2a11ab45bea7eb50e82cfee5dd54b9607f8194e5e9b3f15
font_01_sfnt_off0000f3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E6 10628 bytes
SHA-256: f71a473ef1b7d7b501606cdb3652c966f22c2180de822fc9f3883e098290d7c9
font_02_sfnt_off00011854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11854 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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