Malicious PDF — malware analysis report

Static analysis result for SHA-256 8394d9b74791920d…

MALICIOUS

PDF

81.9 KB Created: 2021-03-18 23:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d877c4be63ee126621aa5571f79d26e SHA-1: bdec13e5565671a9705476d41e96cc80ab9ce6c8 SHA-256: 8394d9b74791920d48bfe0acc70eb9d517db26fb66200e90cdbb2a23ec89bc79
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jottigo.ru/wix?keyword=lumiya+viewer+apk+download+gratis PDF link annotation
    • https://tovijivesigaz.weebly.com/uploads/1/3/5/3/135327805/5398aa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476943/normal_6026a42711266.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/d5a540f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_602bb0be44d32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_603ab4fc3e263.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460071/normal_6002c134316f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465387/normal_5fc9cb6de6082.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kabisebax/film_perang_indonesia_dan_belanda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a20faf-e432-4ae3-a45f-0da5b68e7788/from_third_world_to_first_the_singapore_story_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/canederli_al_formaggio_alto_adige.pdfIn PDF document text
    • http://woporebokut.rf.gd/48188845522.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/lagu_i_love_you_3000_ll.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c5cf749-79d1-46a8-9804-a0d689465868/6958929124.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/the_foggy_dew_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61716ae6-12a3-4444-a6ac-b709c9f954f4/average_grade_point_average_at_harvard.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/85142186592.pdfIn PDF document text
    • http://jegivumupokafar.epizy.com/alain_badiou_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77f6abc-742e-48f9-ba6e-533b28160a15/how_to_put_up_a_windmill_tower.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/sql_server_2017_native_client_11._0.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/5595227210.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/64549680512.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFF 3016 bytes
SHA-256: 437f5c574089599331cadcb6662fc3e289bc3130a96750da26d08c17d15e30df
font_01_sfnt_off0000fa98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA98 1620 bytes
SHA-256: 3be217a4c2c30c9fd964eb2109a9399f42d2ea88753dc90001cf67a9a0d6df2a
font_02_sfnt_off000102bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BD 5540 bytes
SHA-256: 3c43d6eda0a21005284a348d1280ac641383418bf8e6847106714ed97ae526b5
font_03_sfnt_off000115a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A5 10368 bytes
SHA-256: 0e3e5020bfc43cd2de36c599335ef030ad9193e3e4a730a7b04391c12b45881c

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