Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c2a6c838361eec…

MALICIOUS

PDF

104.2 KB Created: 2021-03-17 04:54:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 50cef0dc75a84eacaec4cae1db3280a0 SHA-1: ec0ad813fe0b2e279f67e1e9c90dc46abc3a45a9 SHA-256: e4c2a6c838361eec3f25a2345a0b547af7d1783fc0a629a7e9102e06c2ae79d8
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/123?utm_term=best+bengali+dj+songs+free PDF link annotation
    • https://cdn.sqhk.co/rujojumex/pifAjbt/nazar_battu_funny_video.pdfIn PDF document text
    • https://telabafulux.weebly.com/uploads/1/3/0/9/130969700/1f2814c2271095.pdfIn PDF document text
    • https://cdn.sqhk.co/wefadegese/FghAnc7/recarga_certa_aplicativo.pdfIn PDF document text
    • https://josugutidilem.weebly.com/uploads/1/3/5/3/135387313/90bf8d22dfac.pdfIn PDF document text
    • https://cdn.sqhk.co/xotakuzazuf/5ohqbjc/harry_granny_potter_hogwarts_horror_scary_model.pdfIn PDF document text
    • https://cdn.sqhk.co/bazexolareja/ji8Kgjd/lonuzamegumesuve.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/janodojivi/free_bootstrap_4_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/badshah_full_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/bug_report_miui.pdfIn PDF document text
    • https://1ba6f066-89d4-4445-b8a9-08a6de046ef2.filesusr.com/ugd/d40554_bd88bcf6ae9d4ca3852bfa3f77455ae8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/free_bluestacks_tweaker_4.pdfIn PDF document text
    • http://vonimamodiji.rf.gd/kosulazinoxalutudedor.pdfIn PDF document text
    • http://gokujipavelidaz.rf.gd/95316536886.pdfIn PDF document text
    • http://daxararudivoxik.rf.gd/81964873156.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/mavatukisumevagasinewebus.pdfIn PDF document text
    • http://bapomel.epizy.com/aadhar_card_correction_form_nsdl.pdfIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_9037887e05ab458c9e3b8b693ac4361c.pdf?index=trueIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_3d23849bdfce452ba92fca2758895d45.pdf?index=trueIn PDF document text
    • http://punonawu.rf.gd/xofofokomigubelet.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/bilirubin_formation_and_excretion_ppt.pdfIn PDF document text
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_92585e94444d4691991b9d393224bea6.pdf?index=trueIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_cf71c1814b2b42d6a07db973c71edd84.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/lejavejezaguvimofa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001458e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1458E 5340 bytes
SHA-256: e407eb77a1ffaa1a4ac3ce07859b96604e6dd14b756a69a339660936125fa586
font_01_sfnt_off000157cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157CF 11112 bytes
SHA-256: 155a1c1f939c477ce84c487c844e7f9f750876e23354c32c233fa5b218b74b08
font_02_sfnt_off00017dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DEA 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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