Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29878aac5440513…

MALICIOUS

PDF

66.8 KB Created: 2021-03-16 09:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 68708b09c8962bb92da7684b18395876 SHA-1: 714147df3c261c58149782ba92bd9eab5e1576aa SHA-256: c29878aac54405134536adba33764df12db4178f48ac699854ee10a62d1df5b8
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to phish or distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Dunkin donuts small iced coffee with almond milk calories', likely a lure to entice users to click on the malicious URLs.

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://jumiwimov.ru/strik?utm_term=dunkin+donuts+small+iced+coffee+with+almond+milk+calories PDF link annotation
    • http://vitolebizojigok.22web.org/juwoti.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/data_analysis_excel_2020_tutorial.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/lg_refrigerator_lfx28968st_freezer_not_working.pdfIn PDF document text
    • http://vabuletarikinil.iblogger.org/54307044064.pdfIn PDF document text
    • http://boguzimaro.getenjoyment.net/connect_kyocera_printer_to_wifi.pdfIn PDF document text
    • http://reawont.online/72353893327pk35x.pdfIn PDF document text
    • http://frasqen.online/ethical_hacking_institute_in_ahmedabad9p6sa.pdfIn PDF document text
    • http://rezonansmusic.com/surah_mulk_urdu_translation_mp3_download4iula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pibonev.rf.gd/motorola_xpr_7550e_programming_manual.pdfIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_a0ad2593983149e391d490e9bd62bcfd.pdf?index=trueIn PDF document text
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_c20d2e4d480648299bcfb04b20e01e1b.pdf?index=trueIn PDF document text
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_876ba47282b442b3bda628dc0a40d5f2.pdf?index=trueIn PDF document text
    • http://milovuzojed.epizy.com/datewezoxuza.pdfIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_6359e6c8fd8c487194d456a8872abe92.pdf?index=trueIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_11fec3d748cb4a0f81aca3d8808e3e0f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ecedca-e2bb-4fe9-829a-d134f34ce73e/diary_of_a_wimpy_kid_the_ugly_truth_book_to_read_online.pdfIn PDF document text
    • http://bofujenarabi.rf.gd/puninov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1055418-9a37-46e4-914f-afacfd4354b2/do_i_need_an_eye_test_to_renew_my_driving_licence_in_dubai.pdfIn PDF document text
    • http://dilegefofuz.rf.gd/bubuzab.pdfIn PDF document text
    • http://sinomol.epizy.com/ccdc_20.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_off0000c842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC842 5416 bytes
SHA-256: 0c5309efcfc16ee28c738620769cc79c73ceab94bfd6ac4dc47031635a8ffa14
font_01_sfnt_off0000da9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9F 10164 bytes
SHA-256: fa7d39ad830567dc30d33eb90d7488a5f74ace39ad5f0ce355c84535e49eb2a5

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