Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ce49a212a7f717…

MALICIOUS

PDF

96.2 KB Created: 2021-02-16 18:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b0ecd872b39d1661ea91446ba37a359e SHA-1: a35e2a80471e8d154e2874ce37f7cefa732fa615 SHA-256: f2ce49a212a7f71721f07a035f6c8ac552c23769f7fffce7ddb2d488fc2bea68
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO poisoning attempt. One of the extracted URLs, 'https://leonvi.ru/wix?keyword=strawberry+shortcake+cooking+games+berrylicious', indicates a lure related to popular search terms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via the linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=strawberry+shortcake+cooking+games+berrylicious PDF link annotation
    • https://pewepexit.weebly.com/uploads/1/3/4/6/134659954/diwikes_gemenan.pdfIn PDF document text
    • https://feronokemafa.weebly.com/uploads/1/3/1/1/131164109/venilopituva_regigikexasofo_tudorigive.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/JRhbIjh/nick_cannon_girlfriend_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/EjhzheL/50141011766.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/EyBhjyM/where_we_go_pink_karaoke.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/VGphipY/capture_carpet_dry_cleaner_powder_walmart.pdfIn PDF document text
    • https://wedazosalewe.weebly.com/uploads/1/3/5/3/135337368/rajikokesewe.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/eUb1ihd/petono.pdfIn PDF document text
    • https://sabutiwageb.weebly.com/uploads/1/3/5/9/135992853/c81d7d.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/purawuma/vutukuma.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/38292617919.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/bseb_10th_exam_form_date_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/android_9_easter_egg_pixel_2.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/xokoka.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/97072933846.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/carers_support_grant_form_2018.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBF 6588 bytes
SHA-256: 24fd6868f187b5667792517f9f69d22ac5a3de5011d4d3824467392effeade79
font_01_sfnt_off0000ec39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC39 5716 bytes
SHA-256: 72c39f9a4bef44fca75aa806b880df2e769510135aa07ceb2d38440b6e6ac425
font_02_sfnt_off0000ff98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF98 17552 bytes
SHA-256: 24c0706e0a7b50838130d755a5e741585c30492ade032bf82cc76e00fe209e84
font_03_sfnt_off00012c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C44 11140 bytes
SHA-256: 1b2ced3c174faaae195d346a0878403195375d367d99915420927f22be2a324e
font_04_sfnt_off0001525b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1525B 17036 bytes
SHA-256: 23b48d1ab3577eac032b7017c5a4f519ecb0c99c7172d726ce94dcc52860bd1c
font_05_sfnt_off00016a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A67 1740 bytes
SHA-256: 0fa38b11e28a8990e1b947714e894fba9dc87d533679748745bc540cfc52814c

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