Malicious PDF — malware analysis report

Static analysis result for SHA-256 08168252d4a53a2d…

MALICIOUS

PDF

81.6 KB Created: 2021-02-09 11:04:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 72934ab6eef3d5b7b13baf314a53b8bd SHA-1: 9c7f67093af79aa803040fbb760bfece7232d899 SHA-256: 08168252d4a53a2da3e841ad1898fc980adb969c96217f353593374a15c7a29a
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs, with a critical heuristic specifically flagging it for a mass external PDF link farm. While no scripts were directly extracted, the presence of embedded URIs and the nature of the link farm suggest an intent to redirect users to potentially malicious or SEO-manipulated content, possibly as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/aws?utm_term=chess+java+game++phoneky PDF link annotation
    • https://cdn.sqhk.co/tememukafosu/j9hbTgd/ulala_idle_adventure_hunter_skill_guide.pdfIn PDF document text
    • http://raffle.website/446923995197h0v8.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/djjyge5/tripp_trapp_high_chair_for_sale_ireland.pdfIn PDF document text
    • https://cdn.sqhk.co/xolokenuw/SggVqgs/30749188745.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/Fhbmsgi/flight_status_maputo.pdfIn PDF document text
    • http://begemot.space/mandated_reporter_laws_in_massachusetts2pc8f.pdfIn PDF document text
    • https://zegikawa.weebly.com/uploads/1/3/4/6/134640481/xotorega-sigomawetarar-depezasofatuna-zugipisigek.pdfIn PDF document text
    • http://insitemonitoring.com/20546924151zxwdw.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/ggmhg0m/singing_in_the_rain_musical_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/ghdXcXZ/61516907428.pdfIn PDF document text
    • https://cdn.sqhk.co/puwidebudojo/oihiiZk/favotofat.pdfIn PDF document text
    • https://fekakekofum.weebly.com/uploads/1/3/4/6/134656499/litasijazosatudatof.pdfIn PDF document text
    • https://cdn.sqhk.co/dosojegomugu/7jfifhe/tokezaj.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/jawusawar/54455385026.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/adverbs_of_place_worksheet_for_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/auditoria_ambiental_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/womuvogulejaf.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/acute_bronchitis_symptoms_merck_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/85159828214.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/nerisalikunikod.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/codycross_answers_group_345.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/best_car_games_mod_apk.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_off0000f4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AB 5092 bytes
SHA-256: 1c7ee62c99f00961ee181bfddee1c06e03f8b72c22407604fd827bc992763c5b
font_01_sfnt_off000105eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 10892 bytes
SHA-256: 16387b0248047379acab0f2bac91fd56fa5b725ace89ccf503ff7be1a65f0aac
font_02_sfnt_off00012ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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