Malicious PDF — malware analysis report

Static analysis result for SHA-256 104f603434f5025c…

MALICIOUS

PDF

95.0 KB Created: 2021-03-01 21:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: a1d200652d67d6f2eb2fbf036353fd84 SHA-1: efa88fb3248cbc72ae0306c85507799584f16e12 SHA-256: 104f603434f5025c27e5cee49381daef7780032d668c3b2474dc182e53000888
156 Risk Score

Malware Insights

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

The PDF contains a link farm heuristic, indicating it's designed to host numerous external links. The primary URL, 'https://baarspo.ru/123?utm_term=lirr+schedule+ronkonkoma+to+penn+station', suggests a lure related to transportation schedules, likely to direct users to a malicious site. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing and potential malware distribution 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://baarspo.ru/123?utm_term=lirr+schedule+ronkonkoma+to+penn+station PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387925/normal_602db1b06e9e6.pdfIn PDF document text
    • https://gamidamivagug.weebly.com/uploads/1/3/5/3/135324690/nuvet.pdfIn PDF document text
    • https://zanolidades.weebly.com/uploads/1/3/2/6/132695759/5678968.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366350/normal_5fdeaf74b36e7.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/dewebipufoveba.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/f1a8c74.pdfIn PDF document text
    • https://sosakenokez.weebly.com/uploads/1/3/4/4/134445245/3795843.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_6033101498171.pdfIn PDF document text
    • https://vafabifagid.weebly.com/uploads/1/3/4/5/134583570/sodevotip.pdfIn PDF document text
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/8997db95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448976/normal_602bda6974221.pdfIn PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/jemasenar.pdfIn PDF document text
    • https://gobadinemi.weebly.com/uploads/1/3/5/2/135299992/1344507.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/temujonuwu/antakshari_quiz_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/79292336628.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/samsung_vrt_plus_washer_filter_location.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/anybody_can_dance_tamil_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/12870724917.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_off00012692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12692 5200 bytes
SHA-256: 283b4124ca127464284106a729e5e6332c3347af6a586b2e41bf899ca9d93eaf
font_01_sfnt_off000137ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FF 11952 bytes
SHA-256: 4e0347f5bd921e28c1e1162ab57bc43aaf790fe3d38d21ced16071b875729806
font_02_sfnt_off0001609a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1609A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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