Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5363f964eca4858…

MALICIOUS

PDF

86.7 KB Created: 2021-03-07 20:20:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7be67caea6071b75c61e6fa92f72a2a7 SHA-1: 58b165722aacbb0afd69f4f8ca0ee7fc15b2689b SHA-256: a5363f964eca48585130868b8e02c8fda0b1cdb4e9f838a81b1eda89a02caebf
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and directing users to malicious sites. The primary URL, 'https://jumiwimov.ru/wix?keyword=gotrek+and+felix+pdf', suggests a lure related to search results. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jumiwimov.ru/wix?keyword=gotrek+and+felix+pdf PDF link annotation
    • https://xadafujivesa.weebly.com/uploads/1/3/1/3/131397927/b4cdb88aafd75a.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/rE6geoM/27045351396.pdfIn PDF document text
    • https://retetozatinum.weebly.com/uploads/1/3/0/7/130775023/mitomedoxofozepibaje.pdfIn PDF document text
    • https://lovemaxo.weebly.com/uploads/1/3/3/9/133997317/zogopuvomatok_zudazivuvi.pdfIn PDF document text
    • https://cdn.sqhk.co/pekobenew/GgfT0NY/5152374599.pdfIn PDF document text
    • https://nazugawexavidi.weebly.com/uploads/1/3/4/6/134678572/4986233.pdfIn PDF document text
    • https://wiriresakuboso.weebly.com/uploads/1/3/4/2/134236055/fuwesaziratituruvetu.pdfIn PDF document text
    • https://cdn.sqhk.co/josedinis/ar0CijL/lemarifofazusetefezu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366351/normal_5fc8456baed97.pdfIn PDF document text
    • https://revewodozuxun.weebly.com/uploads/1/3/1/3/131398596/notaliva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467979/normal_601f32b9d57af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499636/normal_6040f22bd8f2f.pdfIn PDF document text
    • https://varusimutajol.weebly.com/uploads/1/3/4/5/134502614/400b3680bf.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/jg9ggEp/datonunelupejax.pdfIn PDF document text
    • https://remejatezikame.weebly.com/uploads/1/3/1/0/131070309/wugoza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xuzed/google_duo_hd_video_calling_app.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/wetaziruxisudi.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/waguxiwuwezula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aa67454-0b0e-4f4e-a169-130aa09f05e7/come_home_to_roost_expression.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db3bdc80-7bf9-4b7f-941f-f7ce312c13e0/ap_style_partial_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/weather_report_in_mangalore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8979edd-fd72-4ea5-991d-a9959ce975f1/82099274946.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/99101994838.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BD 5020 bytes
SHA-256: 483d4df42f2045e3cf0b2399e807483252c5aac9f16a667cc06bd809162468ff
font_01_sfnt_off00012af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF3 10168 bytes
SHA-256: fd3f776f796703f9344c613c2a37f6b7f3f9a8647170c9be79f3beb489e99797

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