Malicious PDF — malware analysis report

Static analysis result for SHA-256 87211296569d6265…

MALICIOUS

PDF

98.1 KB Created: 2021-04-02 04:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30826ca7bc17f04315f59fa3e7b129fb SHA-1: 50f0687ee75d303d2425c3e0b1c7db6c6ee72a04 SHA-256: 87211296569d6265baf78a466f13e6e0c121140a142f15494cbe180256709159
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains an embedded URL pointing to 'golowaki.ru', which is likely part of a phishing or malware distribution scheme. The PDF structure and embedded content suggest an attempt to disguise malicious intent, possibly by exploiting PDF vulnerabilities or using social engineering to direct users to the external site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wix?keyword=ap+world+history+course+planning+and+pacing+guide
    • https://cdn.sqhk.co/getabemuto/DgiPJpu/10258337377.pdf
    • http://lutusogugifuj.iblogger.org/tullio_ascarelli.pdf
    • https://cdn.sqhk.co/kidurukazag/igjjegj/china_online_shopping_all_china_shopping_application.pdf
    • http://miravozexafoxiw.iblogger.org/how_to_fix_a_maytag_centennial_washer_that_wont_spin.pdf
    • https://cdn.sqhk.co/veletafi/hjsOJjj/boss_dd7_manual.pdf
    • https://cdn.sqhk.co/sepovili/amGjijg/ants_in_carpeted_areas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/375603e3-19ab-43ed-b6dc-1bf3bced1044/digibabeguw.pdf
    • http://jatujij.rf.gd/contexto_social_de_la_profesion_libro.pdf
    • http://bidemuv.rf.gd/gta_3_aptoide_apk.pdf
    • https://uploads.strikinglycdn.com/files/3a256668-1ccc-42a6-a4ae-74aa35b61056/how_to_trade_cfd_in_us.pdf
    • https://uploads.strikinglycdn.com/files/d832c2e2-fe31-4991-a860-fe623438211a/gre_test_prep_books.pdf
    • http://jevodowe.rf.gd/19547539603.pdf
    • https://uploads.strikinglycdn.com/files/cea24b96-6f99-43b7-8449-ce8edc7dd6ca/77659837236.pdf
    • https://uploads.strikinglycdn.com/files/00f808b2-5dda-4629-8e5c-1b97170b5119/82768288572.pdf
    • http://pijutisiguzog.rf.gd/xasanukunalegukovomul.pdf
    • http://radetijelatava.epizy.com/twitter_video_gif_er_chrome.pdf
    • https://uploads.strikinglycdn.com/files/c7b71524-534e-48c3-b5c4-e251df655d67/game_maker_tutorials.pdf
    • http://lugirike.epizy.com/two_dimensional_figures.pdf
    • http://seniduvako.epizy.com/characteristics_of_management_science.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000141bb.bin
aa0e49b5a9d7eb02b2480c654bf2c46e7275697f9efd6c88df187ae361975638
pdf-font-stream PDF embedded font (sfnt) at offset 0x141BB 5516 bytes
font_01_sfnt_off0001548c.bin
f8c470fe8610d103ee4a7d77833f83cf35b760a3ffa638c462a0d8e3bbac0c9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1548C 11224 bytes