Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a72ddafcdc88fc…

MALICIOUS

PDF

80.6 KB Created: 2021-03-28 19:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05b2b7e52719eba5eb21ccefd88e35c8 SHA-1: 6e93b094cc970545b6e306ce6aa35574fe56ccc1 SHA-256: 01a72ddafcdc88fcb5cd9f10bad8734f89d10ddde6bf220472568b5ebdc60b21
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, appears to be a lure related to 'Folk song meaning in English', likely to trick users into clicking the embedded links. No scripts were extracted, but the extensive use of external links points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/aws?utm_term=folk+song+meaning+in+english
    • https://cdn.sqhk.co/ximosufi/LXm4aid/madul.pdf
    • https://gopilabuvimira.weebly.com/uploads/1/3/1/4/131453416/2414931.pdf
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/2884137.pdf
    • https://sixojidolox.weebly.com/uploads/1/3/0/8/130814042/wodemivoda.pdf
    • https://fojaloda.weebly.com/uploads/1/3/0/7/130776233/wigewamuzevumeloze.pdf
    • https://cdn-cms.f-static.net/uploads/4391915/normal_601716b910982.pdf
    • https://cdn.sqhk.co/xuwadezab/yTLngjS/mercury_retrograde_october_2020_leo.pdf
    • https://xemibunadagom.weebly.com/uploads/1/3/4/6/134639404/2c3092856.pdf
    • https://static.s123-cdn-static.com/uploads/4408323/normal_5fe1cfb036ce5.pdf
    • http://bigowet.xyz/81371921303tijy4.pdf
    • https://cdn-cms.f-static.net/uploads/4490746/normal_604c978b0e0a5.pdf
    • http://vandify.com/html_to_convert_using_angularjshhw68.pdf
    • http://setavifisotater.22web.org/duruzoniwogobi.pdf
    • http://xitnet.fun/patch_for_rb_world_2_aimbot_downloadbjrle.pdf
    • http://cmb-societe.com/39452115826wvpit.pdf
    • http://vizionsmc.net/laptop_motherboard_circuit_diagramvn1n8.pdf
    • https://mufebomilizupa.weebly.com/uploads/1/3/4/6/134608191/jejebe.pdf
    • https://cdn.sqhk.co/xonepogafix/igMUOrE/guns_and_spurs_2_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vorasatijede.rf.gd/14520277437.pdf
    • http://wotixoweg.rf.gd/27975691969.pdf
    • http://gaxenomo.rf.gd/carl_sagan_cosmos_streaming.pdf
    • http://lomonejezatixow.rf.gd/tree_trunk_table_with_hairpin_legs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f18c.bin
f6cb6c48ea3f079c2659e57125b6016a8d241e349d6949d74f0de65e2ac8e91b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF18C 4732 bytes
font_01_sfnt_off00010165.bin
2b3759fc9f13f0b635223393ff6c3363642a36ff75f4ce1013f3291034adfac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10165 11328 bytes
font_02_sfnt_off0001271e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1271E 4324 bytes

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