Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da449e56b47dff9…

MALICIOUS

PDF

118.7 KB Created: 2021-03-19 13:00:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2394745628870985c649cb32030f1ce5 SHA-1: 32416e12c1ee9094f85eddd76bdaa51da63883fe SHA-256: 2da449e56b47dff9ed31d986a584ccc1fba0b0a4fa6695c2a293af41057902bd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The presence of 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' further supports its malicious nature. The document body, though heavily obfuscated, contains references to 'makkar ielts speaking pdf may 2020', suggesting a lure to attract users to these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://ponafet.ru/award?keyword=makkar+ielts+speaking+pdf+may+2020
    • http://vomimaforotagi.mywebcommunity.org/povenexisuzu.pdf
    • https://cdn.sqhk.co/kenalexuvexu/aiggc7H/sony_playmemories_home_mac_download.pdf
    • https://dexuganepo.weebly.com/uploads/1/3/1/6/131608037/lorezewif-donapedoxema-turifikaguwi.pdf
    • https://cdn.sqhk.co/zudilubal/gddJEhi/syberia_3_review_ps4.pdf
    • https://cdn.sqhk.co/buganixezu/biahdyN/vidmate_er_for_laptop_windows_10.pdf
    • https://cdn.sqhk.co/mijajijem/hbwhbnF/62291665605.pdf
    • https://cdn.sqhk.co/nububufi/higfjgh/sedofepenazuvid.pdf
    • https://mawegovif.weebly.com/uploads/1/3/5/3/135319367/271265.pdf
    • http://bugilinupapud.mygamesonline.org/sar_barbiturates.pdf
    • https://cdn.sqhk.co/levowexesu/3rjiciH/fodewuzoxopikinosat.pdf
    • https://cdn.sqhk.co/dagozuwemep/jaGBChb/earthquake_utah_magna.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wutejaxevewef.myartsonline.com/are_first_responders_paramedics.pdf
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_e573393d036146949f440e44301ab962.pdf?index=true
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_9d311f21a1184d67978b9821912c36c5.pdf?index=true
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_2ec2e6b88a714e6bafffc95c57e3e9a6.pdf?index=true
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_4a46c6ae624643869d58575636e5febf.pdf?index=true
    • https://dd67658a-cc17-4e1c-bca5-42bf299a485b.filesusr.com/ugd/07a440_37f59320f57544679c095fddb2a5abad.pdf?index=true
    • http://xirexadugimog.atwebpages.com/bepoxigu.pdf
    • http://kojenixerog.myartsonline.com/51379293705.pdf
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_f4d9fb787e10425bb46bea6edda1fb6e.pdf?index=true
    • https://89511c73-251b-4bee-a1a5-5f4bd4863124.filesusr.com/ugd/f24cb8_d590853486ef4a1292b1524f540db2ca.pdf?index=true
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_9abe18a2c9dc40f2a261cd48169c70bd.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000183f1.bin
202bdf499275a36882f6f274472b0286d909b9078c50dc2bc20de90bb4be8c12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x183F1 5484 bytes
font_01_sfnt_off0001968f.bin
5f6977b7abac4ced9c3bed7a996663cdb6ac641043d6813854b8cda3034fd045		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1968F 11268 bytes
font_02_sfnt_off0001bcb1.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCB1 4324 bytes

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