Malicious PDF — malware analysis report

Static analysis result for SHA-256 1737148a71602332…

MALICIOUS

PDF

84.4 KB Created: 2021-03-18 15:11:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a1dc68ab11cbf3623beff6a717a4db6e SHA-1: 9ad58c404f5e1f4dd1fee4698ac7e0fe307ee998 SHA-256: 1737148a7160233273c82f4590e7ea193bcdc8d2dc99ad6bcbede66ee14c9090
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm designed to redirect users to malicious sites. The presence of these links suggests an attempt to trick users into visiting potentially harmful web pages, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/strik?utm_term=d%2526d+4e+release+date PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365576/normal_6001e7ae98571.pdfIn PDF document text
    • http://robinmani.site/2019_malayalam_movies_list2zbnd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_604491d981f01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464878/normal_5ffbc6b08b54e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_6042cdb008c0d.pdfIn PDF document text
    • http://a1metromovers.com/bunty_aur_babli_movie_3gpj168c.pdfIn PDF document text
    • http://laguduzimunek.22web.org/10k_running_plan.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/2a1a3fc8-1df7-4dc0-bbd2-6210913608ad/wu_tang_name_generator_reddit.pdfIn PDF document text
    • http://kasupitebuse.rf.gd/57959258956.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/67419287543.pdfIn PDF document text
    • http://zadabodemuliju.epizy.com/89409419284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ed419d6-4e33-4ac0-98e7-8d8a46149ddf/29747509756.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/queen_bohemian_rhapsody_guitar_tab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b7b459f-15f2-4717-a910-b2cccd0dcfc2/49120538077.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/eragon_book_3.pdfIn PDF document text
    • http://ravawubiralimiw.rf.gd/32251510158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e941f2c2-2736-4c49-b471-02f7386453fc/nafakejisugugedaxosenomaw.pdfIn PDF document text
    • http://jejemizon.rf.gd/guzodizipubamorawarelifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/628de089-dad5-4f18-ba3d-743d0af30c9a/family_feud_free_online_edition_pc_game.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/tablayout_in_android_example_with_viewpager.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE724 4156 bytes
SHA-256: 4137e011fb50e940388b7a91a31e36f70741d8ce55ef6fbc7fb0314564e06879
font_01_sfnt_off0000f554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF554 18256 bytes
SHA-256: 3629dc2e400aa0fd8ef47f4b41c553f340c51535e19d96eda72c77e9fcb2b9da
font_02_sfnt_off00012674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12674 19188 bytes
SHA-256: 6192f5c1ce9cc02c291a9cff8b2402a0f26aca0b613c0c83762d3959096a1df6

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