Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de72c0496dc6db0…

MALICIOUS

PDF

82.7 KB Created: 2021-04-30 00:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d83aeef4d9c1e18e7479f0c955e74563 SHA-1: e9b87f4453aefedd9e8f6262a71484cc8a6adfb1 SHA-256: 1de72c0496dc6db0a25504f44a0f213ac64578688310828011c94edba1a97d05
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a large number of embedded URLs, many of which point to disposable hosting domains and utilize UTM parameters, suggesting a phishing or redirection campaign. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing attempt to redirect users to malicious content.

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 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://leonvi.ru/strik?utm_term=difficult+conversations+2.0+thanks+for+the+feedback+pdf PDF link annotation
    • http://lifupodez.22web.org/jack_reacher_tv_series_amazon_prime_release_date.pdfIn PDF document text
    • http://tuzirawejaw.mypressonline.com/27713699309.pdfIn PDF document text
    • http://vataponuxizeliz.mywebcommunity.org/arteria_cerebral_media_segmentos.pdfIn PDF document text
    • http://nituzovido.getenjoyment.net/adenosina_topica.pdfIn PDF document text
    • http://tuzotumefakorok.scienceontheweb.net/buluvapobesubatipopuxi.pdfIn PDF document text
    • http://votatiji.22web.org/jorijole.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muwuvago.atwebpages.com/cambridge_primary_progression_test_stage_3_mathematics.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/convert_video_to_mp4_format_online.pdfIn PDF document text
    • http://nivuzujanux.myartsonline.com/wununafepedojepobufuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/kuranonimakukipepexatu.pdfIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/hydraulic_bearing_puller_project.pdfIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_b8f89df8430b4643a91bd6b53fb93bda.pdf?index=trueIn PDF document text
    • http://detuxidamuw.rf.gd/72349336203.pdfIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_a5e61b076bf14c1288e36e7f2f6b89ba.pdf?index=trueIn PDF document text
    • https://94ac7338-8c66-48ed-b7e4-01cccba3eff0.filesusr.com/ugd/9b8421_7292c21992374478a8898e37dcdf4d25.pdf?index=trueIn PDF document text
    • http://pulitisagot.atwebpages.com/50225896349.pdfIn PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_311d6fd5be414765a7236a6493d6ca5f.pdf?index=trueIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_0dd07ce5b4a747fb92e3dc0850bd4179.pdf?index=trueIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/afterglow_play_script.pdfIn PDF document text
    • http://zefuziboveteg.epizy.com/andhra_university_b_pharmacy_syllabus_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/88056566561.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/lanad.pdfIn PDF document text
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_5fb19b34888145b199310520b44f3f7a.pdf?index=trueIn PDF document text
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_2c4c6979e5df48d782adf95bad0c278b.pdf?index=trueIn PDF document text
    • https://6cda4dd4-8aac-43e7-8003-7c0eea9f7907.filesusr.com/ugd/34e26e_7c604861265c4174aa620a0c4ecb1e77.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBD 5812 bytes
SHA-256: 229d26b7c5a5e9eb457c083b2b6bbd7f7550af3e0b0a7355a2ff0caa3efaebc0
font_01_sfnt_off00010f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8B 16180 bytes
SHA-256: c38ddf547b09d06dedcad81336aff70c912eae89d52afde6dee8bfa877e50e83

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