Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f381554a525c23…

MALICIOUS

PDF

71.5 KB Created: 2021-02-13 22:34:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 39b0bf6ad62bcec9649c39f37939c207 SHA-1: 533454590dedcec9e9d1f37a876c45930130f819 SHA-256: 99f381554a525c239be7da7cd57c5d13b5e213d9c3c254263ac885f149ae0e37
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest the document is designed to lead the user to malicious content, likely for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/aws?utm_term=eeo-+1+pay+data+reporting+requirements In PDF document text
    • https://cdn.sqhk.co/vapelomusanu/ifxyigb/riverside_driving_school.pdfIn PDF document text
    • https://musisemikalig.weebly.com/uploads/1/3/4/6/134694348/zawuxurubitid-xipurevedutitu.pdfIn PDF document text
    • http://artdebug.site/samurai_vs_zombies_defense_2_hack_ioswc6cc.pdfIn PDF document text
    • https://nijumaweka.weebly.com/uploads/1/3/1/3/131379182/da892fa6e10572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454426/normal_60183ef683e78.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/963271224261l1t5.pdfIn PDF document text
    • https://zosojelukik.weebly.com/uploads/1/3/1/8/131871698/renilixidenifig.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/hcvgjjf/sloth_from_ice_age_with_glasses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_6017024ed5dac.pdfIn PDF document text
    • https://xofiwilo.weebly.com/uploads/1/3/1/4/131453946/duxizipasewu.pdfIn PDF document text
    • https://natozopito.weebly.com/uploads/1/3/4/1/134108601/3f74a.pdfIn PDF document text
    • http://damvglaz2.xyz/borderlands_3_ps4_performance_patch3xek2.pdfIn PDF document text
    • http://salebox.shop/summer_games_basketball_tokyo_2020n13q0.pdfIn PDF document text
    • https://busajivajikiguv.weebly.com/uploads/1/3/1/3/131384407/migiwos-bakabesejedepe-gutotam-resuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427519/normal_6009d30d72299.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/jiremegorogilu-kekinewipip-vefidodin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419001/normal_5fe02c607dce3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tumuzu/rufajolaviwasibenem.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/80194847467.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/figakefagoxakivevubapewot.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/39794378659.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/50444879941.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3C 5400 bytes
SHA-256: 9106193e5c3014119e99607ced28ddbbd34248ece1ae68f3c64a2ef85b52232d
font_01_sfnt_off0000e08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08A 9716 bytes
SHA-256: 876fa9585a2a9c874e775c988c740761be72d84c7ebf34dab932100f4a2d3687
font_02_sfnt_off000101d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D3 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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