Malicious PDF — malware analysis report

Static analysis result for SHA-256 956743f9fef888cb…

MALICIOUS

PDF

73.4 KB Created: 2021-03-27 10:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 45d53259d2bbc6b2bea5ecf51b324a9e SHA-1: 562dd63a15fca40d7b8d194f210da755a4063217 SHA-256: 956743f9fef888cbe51e230825e4af5efe6340e6101289bc87ef939b215057e9
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with several pointing to disposable hosting and unknown reputation, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to 'Pete and Pete episode guide', aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://midufefew.ru/wix?keyword=pete+and+pete+episode+guide PDF link annotation
    • http://nonoxutiwi.mypressonline.com/tomebujepoxebozesonukok.pdfIn PDF document text
    • https://cdn.sqhk.co/dutimapo/PZifxBF/email_template_size.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/gjnghOV/sibujidote.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/75149577411.pdfIn PDF document text
    • http://rusadezebep.mygamesonline.org/zilasemakiserakedela.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/9gdjbjf/farming_simulator_16_mods_for_android.pdfIn PDF document text
    • http://wifisef.medianewsonline.com/87619205327.pdfIn PDF document text
    • http://uggi-ugg.com/winrar_64_bit_free_trial8ij5e.pdfIn PDF document text
    • http://groshyk.site/pakoluvenadgnwf.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/70ffb298-1320-4f04-b3a5-2eb299dbb60f/how_much_does_the_average_computer_programmer_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5061a0-9edd-415d-a465-175b4902f7af/36216443749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d17f4f7-41e4-4c10-9b26-76c8ba56ea3f/how_long_is_the_2_harry_potter_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fea56bc-79f1-4ceb-8061-6f53c8112fed/98921367199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b95f47be-18bd-4fc9-a70a-8acbc3dfc362/powerstar_ae125_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd0d141-3105-4a51-8705-a73ccad13f0f/what_is_the_salary_of_an_ethical_hacker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02e278a-b4cf-42e7-be40-078f24bfe1c8/toro_ultraplus_electric_blower_leaf_vacuum_leaf_shredder_51681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1379806-7577-489c-b378-9193e59afee4/jbl_charge_3_vs_flip_4_size_comparison.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a66a4e8a-ad49-4bde-a225-4f8d12f3f935/sennheiser_ew100_g4_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0b05435-963b-41fa-bc6e-8684a7fa5533/how_to_flash_american_megatrends_bios.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_off0000e195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE195 5000 bytes
SHA-256: dfd62836e3916356ceb44d968c9a8ba52cf98458314e51d9f64e4ff2f7b73d2f
font_01_sfnt_off0000f2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AD 10984 bytes
SHA-256: 32e14f544e79b441de6f5e91aa6f2a5a198de1b9341a7a58b520131558d0bdb3

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