Malicious PDF — malware analysis report

Static analysis result for SHA-256 64971b9016460ed2…

MALICIOUS

PDF

80.2 KB Created: 2021-04-15 12:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ca15931334ba2abd2182c7003eefff4 SHA-1: d143d2e38a2e242cd567d8b1a3936d2ba6ad99e7 SHA-256: 64971b9016460ed20994650d89b426660bdc73b60d135bee3e66971791254b3a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search engine result for a common technical question, likely to trick the user into clicking it. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple unknown URLs further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=why+are+my+car+vents+not+blowing+air
    • http://supobesopo.mygamesonline.org/94537510132.pdf
    • http://znasila.ru/nevijefapenomavorolibamf1.pdf
    • http://geloritiveda.mygamesonline.org/projet_d_agriculture_durable.pdf
    • http://spencermcman.us/norifapuzuwakaxasijwerae.pdf
    • http://evilcheats.fun/4937505896019hjo.pdf
    • http://vexetifiridik.mypressonline.com/lufedibowexarabaxaloje.pdf
    • http://wewogokuwidu.mywebcommunity.org/rebizu.pdf
    • http://lifegirls.site/6846517935q1oa2.pdf
    • http://tafugegajotu.mygamesonline.org/bimasodofamezimow.pdf
    • http://vumexovuvelafe.medianewsonline.com/21880473640.pdf
    • http://jirusulixozome.scienceontheweb.net/63262890260.pdf
    • http://wuroguredogir.getenjoyment.net/54613260498.pdf
    • http://xizerunax.scienceontheweb.net/general_awareness_book_for_rrb_ntpc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lizuseguwix/guided_reading_activity_9-_2_answers.pdf
    • https://s3.amazonaws.com/fowikorejodi/86743347576.pdf
    • https://s3.amazonaws.com/sikuva/tekodefusefi.pdf
    • http://jagomizaf.atwebpages.com/john_c_maxwell_developing_the_leader_within_you_2.0.pdf
    • https://s3.amazonaws.com/buxoparadazegu/66681841275.pdf
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_1d239515018949f193d5033a9a47029a.pdf?index=true
    • http://rojanesifilagu.myartsonline.com/blast_is_saitama_theory.pdf
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_c24cb36be0554e24801ab17658e8eac1.pdf?index=true
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_8f59728976b644f297f5848f7993b138.pdf?index=true
    • https://s3.amazonaws.com/kiguteperilodu/the_other_side_of_midnight_online.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa41.bin
c7d21dc83f1ac7d06c0d67fe32830bf3dec8aa84fc936dd8722def284fa2cede		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA41 5620 bytes
font_01_sfnt_off00010d5e.bin
8976386c50506838bae1a6226037421dc77145d47f12f53dfaf7d1c9734a646d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5E 10960 bytes

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