Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6d11f18e03797a…

MALICIOUS

PDF

82.4 KB Created: 2021-03-23 02:13:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1606d703dc6fe30809f1528812f9c3a5 SHA-1: d3acb3fdba44e1b6569981e929f9addd10e8f65f SHA-256: cd6d11f18e03797accaca51730b1a937855b3e6c0cde8868343045f5e59fd4e2
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('soxebez.ru') and another to a link farm ('xagakojitogiva.getenjoyment.net'). The document body, though heavily obfuscated, suggests a lure related to a 'Dell 790 user manual', which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=dell+790+user+manual PDF link annotation
    • http://xagakojitogiva.getenjoyment.net/43788582281.pdfIn PDF document text
    • http://xilasojere.iblogger.org/awana_game_book.pdfIn PDF document text
    • https://sufunisukexe.weebly.com/uploads/1/3/1/3/131381546/naxudo_febawuzin_zinezojeta.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/economics_of_agroforestry_systems.pdfIn PDF document text
    • http://ladariduzaw.22web.org/43483563668.pdfIn PDF document text
    • https://raputaluwim.weebly.com/uploads/1/3/1/6/131606275/ninabidolovofiz-remugifuwikib-josoritakub-xapuribudal.pdfIn PDF document text
    • https://lutatodu.weebly.com/uploads/1/3/4/6/134697406/be82bd.pdfIn PDF document text
    • http://salimom.mygamesonline.org/hindu_religious_books_free_download.pdfIn PDF document text
    • https://bewirupudafa.weebly.com/uploads/1/3/1/6/131607000/lazikonuxus.pdfIn PDF document text
    • https://kuxobemif.weebly.com/uploads/1/3/1/3/131379353/2943901.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fejukuvazov.rf.gd/genetic_code_chart.pdfIn PDF document text
    • http://rotufixijisadi.onlinewebshop.net/what_is_the_difference_between_the_torah_and_the_talmud.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/cara_gif_di_twitter_iphone.pdfIn PDF document text
    • http://molugepunab.epizy.com/golidozedesi.pdfIn PDF document text
    • http://bitinorakinin.epizy.com/27013800751.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/taylor_swift_blank_space_song_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/havre_montana_weather_report.pdfIn PDF document text
    • http://rigexeleza.rf.gd/what_is_a_size_b_aeron_chair.pdfIn PDF document text
    • http://kojosire.epizy.com/16131214364.pdfIn PDF document text
    • http://bazoniwawore.epizy.com/29157910501.pdfIn PDF document text
    • http://fipiwafupogo.epizy.com/behringer_pm1_manual.pdfIn PDF document text
    • http://tosopipates.epizy.com/check_plagiarism_software_free.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_off000104b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B4 5208 bytes
SHA-256: cb69b8ba6a480da7744d52040cd67718c26571e6dc51dc8ad15a8cfd56fc60a7
font_01_sfnt_off0001165b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165B 11180 bytes
SHA-256: a18ce1e60d2f7c7e98afd80285046fc1c3d8e66c048f84d7538e7dfd8c6de17b

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