Malicious PDF — malware analysis report

Static analysis result for SHA-256 681ba60f4677b962…

MALICIOUS

PDF

75.5 KB Created: 2021-02-27 06:37:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b450a7c8effd41c16b26f9d3c4129a15 SHA-1: 6d46fcbdeb498ca5c44e5978028d64acd64dbbcc SHA-256: 681ba60f4677b962e673ae06f84c6f1df94350d98ddf4c08e2b47e05e72f259a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://xajibur.ru/wix?keyword=walking+dead+iphone+6+case', suggests a lure related to popular culture to attract clicks. ClamAV also detected this file as 'Pdf.Phishing.Trojan', indicating a malicious intent. The presence of embedded URLs and the ML classifier output further support the malicious classification.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/wix?keyword=walking+dead+iphone+6+case PDF link annotation
    • https://cdn.sqhk.co/dedenijikal/aDjdMxm/tdfw_button_turn_down_for_what_buttons.pdfIn PDF document text
    • https://cdn.sqhk.co/dopebuxoz/je7fkig/jurassic_survival_island_hack_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/widFBih/miteb.pdfIn PDF document text
    • https://cdn.sqhk.co/telapunojawu/ifNtjjN/wheelie_challenge_tomico_ios.pdfIn PDF document text
    • https://rowiteruna.weebly.com/uploads/1/3/4/4/134470704/82804.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/CjiTHjd/marxist_criticism.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/9ibODCN/68117636196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502511/normal_602fab45228f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bobupugarini.epizy.com/rune_factory_4_guide_marriage.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/jitewenifaz.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/28850912743.pdfIn PDF document text
    • http://putiremupupunis.epizy.com/vaaste_video_song_3gp.pdfIn PDF document text
    • http://tosopipates.epizy.com/65039779758.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_off0000ea98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 5472 bytes
SHA-256: 4504cba434fb42aedbcbfe1d1befbb999ae8e6bb18e02b36f0f46395e6b9c995
font_01_sfnt_off0000fd3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3F 10660 bytes
SHA-256: 2ff93ff57e6efa018069181cb8cb60134217b14dfc10ea6f9c08df263d50050c

Open this report in the interactive analyzer, or submit your own file for analysis.