Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c21a7aac581e45…

MALICIOUS

PDF

91.8 KB Created: 2021-03-19 19:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f36e7e45b7144118546c73be46c47116 SHA-1: b4a48c2c51ba04a3d428f929657383301a5bc59f SHA-256: 59c21a7aac581e4569e0462f449b3f9015cdfe0dea58ff4b188458091765148d
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 designed to direct users to other malicious PDFs. One of the primary external URIs, 'https://leonvi.ru/wix?keyword=green+tree+servicing+payoff', suggests a lure related to financial services or payoffs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=green+tree+servicing+payoff PDF link annotation
    • https://disezoken.weebly.com/uploads/1/3/5/3/135327633/71ee77a825521.pdfIn PDF document text
    • https://mapunexi.weebly.com/uploads/1/3/3/9/133999872/7890408.pdfIn PDF document text
    • https://cdn.sqhk.co/toliximozupa/p3hgPYu/kedijagawemejanefipoju.pdfIn PDF document text
    • https://cdn.sqhk.co/kufezagivori/h3hQC9u/rizowibivewevipaziva.pdfIn PDF document text
    • https://todukikezigegu.weebly.com/uploads/1/3/4/3/134359798/tetolab_sagizepobos_fikizovij.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/fefaripisasot.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/JjeRiea/81671402141.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/gknfR1f/todaxanuzatakulupawe.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://uploads.strikinglycdn.com/files/b133315d-6c33-43c3-b0e4-53fef88bfad7/macbeth_act_2_scene_1_what_cursed_thoughts_does_banquo_have.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/worksheet_on_animal_life_for_grade_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3db7514-8d55-4ac9-8ce6-3f24fcece1be/65539293446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68585384-f720-4a52-8cb0-ef684cfcc283/67309112816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a5b6cb-8326-42e7-9065-16d3dc5bf3cf/godin_a6_ultra_koa_hg_limited_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e40d650e-5afa-4db6-9e03-4b0c697bb26f/67562433956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58078c22-85ae-4665-b88f-01032cc533c7/winter_house_tips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba0cc650-0a68-436b-8381-4605ce09e5ff/lilibusisisovarovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8197715f-8756-4c74-82a3-1786d4ba7388/what_are_the_best_dewalt_drills.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/professional_resume_template_free_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/discussion_essay_sample_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51cec7ba-e815-4231-8659-e453ff995729/fibesaneberilazerejeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3739230-7928-43f9-a918-7b6950773cae/saxatusato.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_off000118e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E2 5132 bytes
SHA-256: 4e9043661cf8d1a41f77f690246305d12290a9bad727cda6d13d27453037411f
font_01_sfnt_off00012a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7C 11692 bytes
SHA-256: ff3662d0d892f11603d309f7257beaff15d96957916b86e85c66c5181fb23f03
font_02_sfnt_off00015232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15232 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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