Malicious PDF — malware analysis report

Static analysis result for SHA-256 842401b5cd6df8d9…

MALICIOUS

PDF

77.7 KB Created: 2021-03-31 13:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1c2f98b589704edd9a75a74b110b5dcc SHA-1: 71b9dc284da289a60e06943b05e981c25b1d6a45 SHA-256: 842401b5cd6df8d99d7e8fda271ba7d0a98ea9a670d8ca46fcc8856fc52683bb
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/wix?keyword=cracked+apk+apps+2020 PDF link annotation
    • http://lavka-karamel.ru/99957895344g434w.pdfIn PDF document text
    • http://hookup754.fun/how_much_is_tom_hughes_worthub1rd.pdfIn PDF document text
    • https://cdn.sqhk.co/dagidomu/3rigZlI/82304185556.pdfIn PDF document text
    • http://distornyup.site/154643101425avo2.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/mibnLeT/comics_online_store.pdfIn PDF document text
    • http://about-central.com/fujetebalugzp61y.pdfIn PDF document text
    • http://buylettersonline.com/biwenijapepowoe1vb8.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/dXjchbT/vupeg.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/biology_textbook_grade_10_12.pdfIn PDF document text
    • http://clientesdkb.com/worksheet_on_vernier_caliper_and_micrometer_with_answersihhwa.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/Khhf807/javujarazekiwubiraxujogap.pdfIn PDF document text
    • http://vereffka.xyz/a_lesson_before_dying_audiobook_chapter_14j2dvw.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/posufij/ponaniwoguxol.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/wujugorovetabomo.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_b9b003242fbb41d59214a602aa6328a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/is_there_a_reset_button_on_hitachi_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/23732094844.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/31682088615.pdfIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_c839beebee8a4144b65dd6f3d509a9fb.pdf?index=trueIn PDF document text
    • https://748e62c5-a849-4dff-87e7-3b5f74cb3522.filesusr.com/ugd/0df896_edadceb033ee492aaf16a9df0da2477d.pdf?index=trueIn PDF document text
    • https://d6ac5066-27fc-4e71-a07d-b30af50dfe8b.filesusr.com/ugd/934fc3_d027c53325844586aa6d9751eb5b07cf.pdf?index=trueIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_bd7a9db6783a4b839e5123e338fa7b53.pdf?index=trueIn PDF document text
    • http://wewamamewiler.atwebpages.com/93920435341.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_off0000ef87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF87 5280 bytes
SHA-256: 73fd34f6118790ed80e10159181d7f1c1ba0154538fa2b40e1d05a7480e7e02a
font_01_sfnt_off00010186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10186 11820 bytes
SHA-256: 27fb4363261052cd5b6db9d3f1520ca1478b4b39ed5946eae7a8e546bc310c2e

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