Malicious PDF — malware analysis report

Static analysis result for SHA-256 220dc0b780851498…

MALICIOUS

PDF

97.7 KB Created: 2021-03-10 15:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82d97da0e35c8017d9165e05a54d8b44 SHA-1: 7d728cd7260c46246e9ea621013e1387f85f12b1 SHA-256: 220dc0b780851498c0ae7647f4c9dae335200413b9ae834eb0fe54a3c9e10856
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it's part of a link farm or SEO spam campaign designed to drive traffic to malicious sites. The embedded URLs, such as https://xezojetit.ru/strik?utm_term=samsung+s5+active+launch+date, are likely used for phishing or to host further malicious content.

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://xezojetit.ru/strik?utm_term=samsung+s5+active+launch+date
    • https://static.s123-cdn-static.com/uploads/4366958/normal_5ffd4b6756b94.pdf
    • https://revawowi.weebly.com/uploads/1/3/5/3/135317167/1724152.pdf
    • https://razivizufizide.weebly.com/uploads/1/3/4/5/134525322/1781308.pdf
    • https://galujamisone.weebly.com/uploads/1/3/1/8/131871568/wedipibi.pdf
    • https://xajupodesuze.weebly.com/uploads/1/3/1/3/131380723/5ce1c4e749b7.pdf
    • https://cdn.sqhk.co/fusajovogi/giijhje/castaway_bay_mario_party.pdf
    • https://wawulawad.weebly.com/uploads/1/3/4/8/134872625/f54cf8075afd.pdf
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/lijumasax_defem.pdf
    • http://tijevuwotej.22web.org/stylish_academic_writing.pdf
    • https://midepixa.weebly.com/uploads/1/3/4/6/134622545/vevojuxuditifug.pdf
    • https://static.s123-cdn-static.com/uploads/4445128/normal_5fcccc5cf0572.pdf
    • http://xabisafeb.22web.org/jutizisavetibepotuw.pdf
    • https://jedagafigi.weebly.com/uploads/1/3/1/4/131438055/muragewag.pdf
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/a0a58f78b0096.pdf
    • https://xezixopizanew.weebly.com/uploads/1/3/5/3/135314636/nutujefafilamu-vesukativadomu-gijavasoda.pdf
    • https://cdn.sqhk.co/suxumeva/agfgfji/lejusofipidabewipiti.pdf
    • https://cdn.sqhk.co/metumolalub/gcugd4v/crowded_teeth_before_and_after.pdf
    • https://cdn.sqhk.co/merabuvi/0bcK6ie/68613810993.pdf
    • http://xupenirulavep.iblogger.org/pokka_carrot_juice_nutritional_information.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mepogevotu.epizy.com/macedonia_country_report_eu.pdf
    • http://jogekofasi.rf.gd/wunakuzezozukon.pdf
    • http://xodezuraweba.rf.gd/starling_bird_calls.pdf
    • http://vejesigivilowen.rf.gd/cra_corporate_tax_return_forms.pdf
    • http://disorasejazamu.epizy.com/absence_class_formal_letter.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d6c.bin
8101dfc8039196d487456ea666445b9f6d013873874b7503b14431835aba23c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6C 5544 bytes
font_01_sfnt_off0001502e.bin
1c04b519661fabdc312a0e2fd0f9132e1e58f9929438acda970f28c8852226a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1502E 11840 bytes

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