Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4b11845cfb0018…

MALICIOUS

PDF

91.7 KB Created: 2021-03-16 04:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f50919e9043ac7de4218a993444a1611 SHA-1: 52e6ff1ef4aa69fdcf82ac3a5308c67a6b35c2d0 SHA-256: ea4b11845cfb00180ff7a7da5de775fede89d4d748b87449b6aaede1a0b508f4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URL pointing to 'xajibur.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'retirement planning'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/wix?keyword=retirement+planning+xls PDF link annotation
    • http://graatorama.space/is_dunkin_donuts_still_doing_2_for_5255wf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450639/normal_5fe824a5efa0d.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzodidudi/Gsiahhf/chandelier_the_voice_performance.pdfIn PDF document text
    • http://nuxipawuxodiwa.getenjoyment.net/lutidusojewumatavo.pdfIn PDF document text
    • http://reduslim-officialsite.site/mabemosedawizekovexijewe1ld5.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/spencer_centrifugal_blower.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421350/normal_60091ce5be41e.pdfIn PDF document text
    • http://bet-info.ru/how_to_set_a_marathon_wr30m_watchj717k.pdfIn PDF document text
    • https://cdn.sqhk.co/dimasemi/hwjhojc/24693610424.pdfIn PDF document text
    • http://xoxosedefoxadu.mygamesonline.org/brain_anatomy_coloring_book.pdfIn PDF document text
    • http://mynasert.online/first_aid_for_burns_and_scaldsh4dsg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474980/normal_60233aab68c84.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/gopifu/correct_address_format_for_spain.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/reporting_accidents_at_work_form.pdfIn PDF document text
    • http://bejanifezilo.atwebpages.com/kenmore_refrigerator_106_ice_maker_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/orlando_virginia_woolf_symbols.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2368e540-055a-4034-8af2-27c576b584b1/windows_7_torrent_tpb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adde8785-37a0-4c5c-b701-cfc0a7965ed4/23339661625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c234d9-f291-4b6b-9a80-bf50c4b09dc1/63032226300.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/vijol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/441a08dc-9145-4cb6-acf3-17023fed37a0/shark_navigator_dlx_reviews_cnet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46bed36b-f47d-4536-8f84-d2b044d81bd8/bissell_proheat_2x_8920_manual.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_off000129e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E3 5216 bytes
SHA-256: cc1affeac43ee3ae19b9aae40ff2cee9003dae0b3cf536db4494c1926c0ebfa0
font_01_sfnt_off00013b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B92 11096 bytes
SHA-256: 4d3ccac05fe00872c0c42fa6fdf4d69f8f69393d524616dd91de2e2f929326cd

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