Malicious PDF — malware analysis report

Static analysis result for SHA-256 f460b13a8c234313…

MALICIOUS

PDF

73.7 KB Created: 2021-03-23 18:22:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 748dcbb80355e8cb748df5bc9b919edb SHA-1: 54ffc17a2d3dcfce7d9f0ad3ef9c7ea160465f64 SHA-256: f460b13a8c234313d03d4441ac1d833e1adc44b4a91023fd5b325bdb73a04e78
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically targeting 'aol mail sign in problems'. It also exhibits a PDF link farm heuristic, indicating a large number of outbound links. The embedded URLs and the document body content suggest a phishing or scam attempt to redirect users to malicious sites.

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
  • 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.
  • 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.
  • 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://dafemum.ru/wix?keyword=aol+mail+sign+in+problems In PDF document text
    • http://wiinorama.space/subwoofer_qsc_k12_1000wrtuuo.pdfIn PDF document text
    • http://cookwellbakewell.com/timokarejena58xtf.pdfIn PDF document text
    • http://topstop.site/action_replay_dsi_operations_manualisg6h.pdfIn PDF document text
    • https://xatefokagakutil.weebly.com/uploads/1/3/4/1/134108848/jetopufusuzobiponuz.pdfIn PDF document text
    • https://cdn.sqhk.co/perekowemo/jyCge8z/my_talking_tom_hack_mod_apk_download.pdfIn PDF document text
    • http://civiliscmq.online/is_headphone_zone_good6paka.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/jiMijaT/jungle_adventures_prices.pdfIn PDF document text
    • https://zivotawab.weebly.com/uploads/1/3/4/5/134576919/rukokeporinexe_dagoxoruvogek.pdfIn PDF document text
    • http://wacc-cat.org/wazuketuvilaw3bvid.pdfIn PDF document text
    • http://dfwshootersupply.com/best_android_samsung_tv_remote2gbs4.pdfIn PDF document text
    • http://abreudesigns.com/is_epic_emr_hard_to_learnmgevd.pdfIn PDF document text
    • http://stnold.com/44326120828ctkjn.pdfIn PDF document text
    • http://nobirejajatit.iblogger.org/33627555065.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pepukogabam.rf.gd/wivorolusuvigapediloma.pdfIn PDF document text
    • http://xewaxal.epizy.com/wefig.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/case_study_format_example_for_nursing.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/angular_6_formbuilder_array_example.pdfIn PDF document text
    • http://xarezebabanadot.epizy.com/juvowugaginojasasugep.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/gekusaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/thinking_in_java_bruce_eckel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/the_brothers_menaechmus_er_watling.pdfIn PDF document text
    • http://tisiwiruligeg.epizy.com/kuzagilesopomakunavabame.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_off0000e4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C6 5268 bytes
SHA-256: 1236a3081db41d94a5712ee6711a4d560d4d5c9d46a49533995048fc35172890
font_01_sfnt_off0000f693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF693 10192 bytes
SHA-256: 34015d104c4f940732ddae8d328be1ac6ca25ae1d591b970fed9d52341a4aa57

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