Malicious PDF — malware analysis report

Static analysis result for SHA-256 c324a529e76c6c00…

MALICIOUS

PDF

73.0 KB Created: 2021-04-05 08:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 155cfea46933134e00e5430368899246 SHA-1: 594573746105218bc98879eda4b90d16adb98b00 SHA-256: c324a529e76c6c00bab428a45c47bf879d25d2f0b40275116985b8f97f4199ee
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://bologen.ru/wix?keyword=mobile+small+engine+repair+spokane+wa', suggests a lure related to local services, likely to drive traffic to malicious or spam sites. The ClamAV detection and ML classifier further indicate malicious intent, consistent with phishing or SEO spam tactics.

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://bologen.ru/wix?keyword=mobile+small+engine+repair+spokane+wa PDF link annotation
    • https://nifonafepo.weebly.com/uploads/1/3/5/3/135319448/e39a8ceee4a.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/apologia_de_socrates_platn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490366/normal_5fdda681cbebb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376380/normal_6044ffd0df52c.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/albinoni_adagio_organ.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_602827edb9f6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_6021659dd898b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467043/normal_6013b0ac1ef05.pdfIn PDF document text
    • https://xodobojedabime.weebly.com/uploads/1/3/4/6/134675451/5556894.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/balanced_scorecard_example_manufacturing_company.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/falevi/ielts_speaking_topics_answers_free.pdfIn PDF document text
    • https://5c9c3928-af7d-4195-9e43-9647d7263c15.filesusr.com/ugd/508998_d1131c125148472faaf371e5757b18b4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/descriptive_geometry_pare.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/3d_football_games_for_android_mobile.pdfIn PDF document text
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_ea5036dfd378480fadaefc6259c15116.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezutu/escape_plan_hd_movie_in_tamil.pdfIn PDF document text
    • http://zodiripek.myartsonline.com/pumaz.pdfIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_f7934c5b65f740b2b190fc77f5e9f9d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mokixetat/kelsos_choices_lessons.pdfIn PDF document text
    • https://59b17237-83b3-47c6-9d40-f547da5b0434.filesusr.com/ugd/827194_c4bf90817ad3400cae407dc818abad84.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28E 5148 bytes
SHA-256: b4541432c81fc44bd2f0b4cc06ed438866ccb143135d7654192c3fc63ada4ad2
font_01_sfnt_off0000e3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F9 10772 bytes
SHA-256: ded4fb4cc9e561f34cd7b21ebf7aaf671a5b0f7909bb3393b816689c47bdc77b
font_02_sfnt_off000108ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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