Malicious PDF — malware analysis report

Static analysis result for SHA-256 413c44df79de5ad6…

MALICIOUS

PDF

87.9 KB Created: 2021-03-04 06:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 945a98cf88e2e09ee5977f603ab7f807 SHA-1: 79d85e3c5ef402d2819eff3d98abdc0bed4ebc3c SHA-256: 413c44df79de5ad63717eb89a188b7244fd391fa87e346e1c51cf3e589ad43ad
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with one specifically pointing to a URL that appears to be part of a link farm designed to mimic search results. This suggests the document is intended to redirect users to potentially malicious websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=chemical+composition+of+seawater+slideshare PDF link annotation
    • https://cdn.sqhk.co/xutazazo/ciiXjfj/11077262835.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/xokukepevo-kivojuxosave-depabagu-dezulusive.pdfIn PDF document text
    • https://rodedewosesuge.weebly.com/uploads/1/3/6/0/136010241/7206073.pdfIn PDF document text
    • https://rixijufufapug.weebly.com/uploads/1/3/4/4/134497528/jafapedaxisuned.pdfIn PDF document text
    • https://vogavowaxataner.weebly.com/uploads/1/3/4/2/134266619/39a66.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/examples_of_imagery_in_romeo_and_juliet_act_2_scene_2.pdfIn PDF document text
    • https://lasebotoxuxuxir.weebly.com/uploads/1/3/4/7/134729765/kadunubazaxera.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/adventures_of_huckleberry_finn_summary_chapter_4.pdfIn PDF document text
    • https://gorimulokubev.weebly.com/uploads/1/3/1/4/131438265/guziwewesubufel_wolona.pdfIn PDF document text
    • https://bozadabeduli.weebly.com/uploads/1/3/4/8/134869561/gerinolap.pdfIn PDF document text
    • https://rezapikuxodet.weebly.com/uploads/1/3/0/9/130969426/173e6218a3f963.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/android_vehicle_emulator.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/47114412886.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/regeturunuxakuvojovado.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/certificate_of_conformity_uk_example.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/westlife_songs_listen_and.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/zakevokurinawiseniw.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_off00011bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB9 5392 bytes
SHA-256: ca2d33e720249d0f454e75907932ce18d7717136b8237edb009be68cd635d926
font_01_sfnt_off00012def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEF 10568 bytes
SHA-256: 2f77f74ab0a9bb172256fb8a936ea6a524040507ad3d2b7f68dc4bb75fad2093

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