Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f1150db2e3f0d5…

MALICIOUS

PDF

71.3 KB Created: 2021-03-10 04:37:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: babfb5f67897e088670281b24f3b3c66 SHA-1: 95dab439a896efc50e10dcb1e4e5bdc602322419 SHA-256: b9f1150db2e3f0d5e3484cb906137028c1ffbdf3e487f09438ebc41c9a14eac0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. One of these URLs, 'https://lozipotod.ru/wix?keyword=noun+verb+sort+worksheet', is embedded directly. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=noun+verb+sort+worksheet PDF link annotation
    • https://wopokajam.weebly.com/uploads/1/3/0/8/130874492/4612087.pdfIn PDF document text
    • http://blog-millionaire.buzz/zenofaxunejebikosonowalsx4y9.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/79709724475yhjrp.pdfIn PDF document text
    • http://myfavoritesun.xyz/magic_bullet_banana_smoothie_recipesfjnod.pdfIn PDF document text
    • https://xinelonaveguv.weebly.com/uploads/1/3/4/6/134606197/eaa6d2ce9440ff.pdfIn PDF document text
    • http://allieshouseofhope.com/97726524402mrcdz.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/tefoni.pdfIn PDF document text
    • http://alkim.xyz/blue_jays_2020_schedulellg2q.pdfIn PDF document text
    • https://venewosusi.weebly.com/uploads/1/3/1/3/131398385/7315485.pdfIn PDF document text
    • https://towowiwegopute.weebly.com/uploads/1/3/4/0/134019464/c2351797.pdfIn PDF document text
    • http://datingdate.site/verizon_router_settings_for_gaming_20209bv26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_54fe87bd4df54a52bc0fde2de163e179.pdf?index=trueIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_e3e7da3bbc904926ad38da8435066375.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falevi/suunto_ambit3_vertical_watch_band.pdfIn PDF document text
    • https://4192d618-ecd7-4808-8485-efd4d6773ded.filesusr.com/ugd/17a5db_d7a762e482b640a6a12e99dea8bbb8f7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/balokito.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/cracking_the_toefl_ibt_2018.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_2c744722d5f442a98232b8da8894a9ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/27572417715.pdfIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_e53522843c8b4ea59f655d17d450aca6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisazabe/63603422620.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/desierto_florido_informacion.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC28 4856 bytes
SHA-256: 0d9a71919485abe8b76bd5e219ea80ae9311ff04c5e021d39385ea8b5403c45d
font_01_sfnt_off0000ecc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC3 10240 bytes
SHA-256: 66f1167ba4884e6f13947ad2169382865a70918b792e89e0e7ae648cc318e51d

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