Malicious PDF — malware analysis report

Static analysis result for SHA-256 79167fb604a6e9ee…

MALICIOUS

PDF

81.2 KB Created: 2021-05-07 00:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8c057fa348096e7ce3d3de3629711049 SHA-1: d0d265748f8330ded2cb4b67607e135e75dd3400 SHA-256: 79167fb604a6e9ee4b0fb81207a35f91e7b1fb4c41e63c5c3a2b78198a844c20
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://druttle.ru/strik?utm_term=angelcare+babyphone+ac+401+bedienungsanleitung', which is likely used for phishing or to distribute further malware. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', further supporting its malicious nature.

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://druttle.ru/strik?utm_term=angelcare+babyphone+ac+401+bedienungsanleitung PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485310/normal_602be04a8aca2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426425/normal_6018d6d82af69.pdfIn PDF document text
    • http://5-euro.info/56506590213j8un7.pdfIn PDF document text
    • http://obzorov.site/56413898790woeek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/455e6992-fb67-4ffb-85d6-9b15058de3f8/kayak_merit_badge_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/cece_winans_it_wasn_t_easy_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/7144585237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2415dadd-0ee0-4456-8c58-245766aa78e2/how_does_a_washing_machine_without_agitator_clean_clothes.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/what_does_cash_allowance_mean_when_buying_a_new_car.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/understanding_income_statement_for_dummies.pdfIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_2063136bc3a64e528e99d113d3bf37bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dixaleko/82576955365.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_46e46456a8c74c1fa3a574f1a897a675.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a98fa91-aa3b-439e-bc98-f0cf36029439/7904394599.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/bumufumomufewezozojurib.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/white_christmas_ornaments_set.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/handmade_sheet_folder_making.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/melaj.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/lutuzavimimagopemutefunod.pdfIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_2a5cf0ccfdc841b492b5addc9d017b04.pdf?index=trueIn PDF document text
    • https://17500468-634e-4f48-81ad-48a4a068d6fa.filesusr.com/ugd/dcac76_9e93e05a06ca4d02b05ac465362085d7.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_off0000f153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF153 5848 bytes
SHA-256: d4a3cd7c3bbef34e756bf2efe3144ae67552b59fe562d54d9ccde1bf178e400c
font_01_sfnt_off0001053f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053F 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCD 11364 bytes
SHA-256: c5f3f689e31bb33cb37017b5a754a3b3e0901bcb338ee903d39c75d631d43e03

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