Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f55daeaa63944e…

MALICIOUS

PDF

84.4 KB Created: 2021-03-16 21:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60f4e1f43d6500901387ddd0cc021290 SHA-1: 144d9ab3ce86f9d9241d4ecd3ac84a5fe5fba977 SHA-256: 60f55daeaa63944e799e7ab063446fd9cef2c46736b41bf42755f32f527d4922
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to domains designed for SEO link farming, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate malicious content, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'carnatic music basics in tamil pdf', which is likely a pretext to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-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://jumiwimov.ru/award?keyword=carnatic+music+basics+in+tamil+pdf
    • http://zisuroto.mygamesonline.org/wepofokusazitegipedozozig.pdf
    • https://static.s123-cdn-static.com/uploads/4460968/normal_5fc6b9c63b596.pdf
    • https://cdn-cms.f-static.net/uploads/4426957/normal_600fa1d996997.pdf
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/3013536.pdf
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/3f29edbddea.pdf
    • http://duzixofiwisegi.mygamesonline.org/degasot.pdf
    • https://cdn.sqhk.co/linidivez/bgjRXhf/famous_90s_dance_djs.pdf
    • https://sevimuxeso.weebly.com/uploads/1/3/0/7/130739978/pijebopakiwuzotoxile.pdf
    • https://tigasedoxopafu.weebly.com/uploads/1/3/4/7/134707490/1191a51.pdf
    • https://cdn-cms.f-static.net/uploads/4452389/normal_603321abb8534.pdf
    • http://lipazegeboludep.sportsontheweb.net/10521124386.pdf
    • https://cdn.sqhk.co/puxitika/fgSPgdC/renugimupoziwemamixevu.pdf
    • https://cdn.sqhk.co/nujorazaje/aibiige/jaxit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_733c7d590bbc4b29b65b614ba1ffe982.pdf?index=true
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_d2677c224b41438781a07037ae2de785.pdf?index=true
    • http://saxodanokijaj.atwebpages.com/29103106854.pdf
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_890c399f389d4cef833b1dc5fa5ba1f2.pdf?index=true
    • https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_90a0a7c1f0de4263bc6b61ee06c9ff34.pdf?index=true
    • http://saxodanokijaj.atwebpages.com/once_minutos_libro_resumen.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e410.bin
ffffdddbf528bafc3aa28536bb20d7e5254773688c24c0120fb107d767d623ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE410 5116 bytes
font_01_sfnt_off0000f54a.bin
0f8819385b88bdf2c931ff2108f72755ec464e61e41b8d365e745edc20d07798		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF54A 12812 bytes
font_02_sfnt_off00011f27.bin
159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F27 16140 bytes
font_03_sfnt_off00013423.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13423 4324 bytes

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