Malicious PDF — malware analysis report

Static analysis result for SHA-256 81eebe2f7c56216d…

MALICIOUS

PDF

82.7 KB Created: 2021-05-15 18:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aecc8fb0bebbaaf078413f38c9a0789a SHA-1: d83bc85b1e4c18fd14b57cbe14b053fff3a20ff5 SHA-256: 81eebe2f7c56216d6988bac88fdb84ff865d361a7c12ad0d12e666cd4afd197f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 it is likely a phishing or SEO spam document. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains text related to charging AirPods, likely a lure to entice users to click the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/strik?utm_term=how+to+charge+tws+i12+airpods PDF link annotation
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/wotugoxika_xobazeg_tusesabe.pdfIn PDF document text
    • https://rinilevewabidu.weebly.com/uploads/1/3/1/3/131382630/9956023.pdfIn PDF document text
    • http://leafester.online/how_to_become_a_master_storyteller_on_picsartw5kop.pdfIn PDF document text
    • https://rejasujewefem.weebly.com/uploads/1/3/0/7/130738882/velimidizu-fupefe-koverif.pdfIn PDF document text
    • https://duvozeja.weebly.com/uploads/1/3/0/7/130739152/6089501.pdfIn PDF document text
    • https://vebudizegegogog.weebly.com/uploads/1/3/1/3/131398423/miteburepuro.pdfIn PDF document text
    • https://nelodukes.weebly.com/uploads/1/3/6/0/136085721/sesofew.pdfIn PDF document text
    • https://tawusizigegik.weebly.com/uploads/1/3/3/9/133997505/beduxaxiz.pdfIn PDF document text
    • https://zinaxavum.weebly.com/uploads/1/3/4/3/134354277/9745288.pdfIn PDF document text
    • https://vuzabevewipa.weebly.com/uploads/1/3/6/0/136087677/cb10fe57b624f.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/240568520006s7ik.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/ancient_greek_government_interesting_factscmjcb.pdfIn PDF document text
    • http://leree6.club/kixaduxuzulofufuxopjiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/cadmium_plating_process.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/58291585432.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/nowefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cf18150-0080-46ce-be56-174e1e954e05/84178040310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa0725a-e231-4ce0-aaa4-f94289b8c35c/how_do_i_calibrate_my_acurite_humidity_monitor.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/free_printable_spring_color_by_number_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/thomas_jefferson_quotes_education_and_democracy.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/88594607980.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/96394541918.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/53024162728.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/ocarina_of_time_n64_rom.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_off000100b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B9 5540 bytes
SHA-256: 19f38831999231770520214a1150e6a0f53bdbfc0dc67b21e812860268734ca8
font_01_sfnt_off000113a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A5 11696 bytes
SHA-256: ef69313bbad71253b76b7c3fbc0ff686749453424b6af79cd7ac6cfaaceb03de

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