Malicious PDF — malware analysis report

Static analysis result for SHA-256 8963f6da687ebd8f…

MALICIOUS

PDF

82.7 KB Created: 2021-03-28 18:34:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4083c89fc3e702858731fc24c133e8dc SHA-1: 15562508d2382c51e72ace846bc74e860a1c4cd1 SHA-256: 8963f6da687ebd8f171968cc50c8d8fd5ce035f4a02aec18b98b2c13cd626a96
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 0.9998

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://lozipotod.ru/strik?utm_term=very+short+moral+stories+in+telugu+with+pictures PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408720/normal_600bef136fa61.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/nTd9ibK/zombie_escape_room_houston.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/mo7ihhi/fantastic_fishing_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/mowefakura/rifaidw/sotopinowopat.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/CiesScD/granny_chapter_two_gameplay_walkthrough.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479441/normal_5ff70db85b5f4.pdfIn PDF document text
    • https://tekopazaxalar.weebly.com/uploads/1/3/4/3/134348639/9390705.pdfIn PDF document text
    • https://cdn.sqhk.co/rivinodati/qjcnHnB/game_maker_studio_1._4_download_free_full.pdfIn PDF document text
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/sixugivup_sevigepo.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/navoburarovada/perfect_brownie_pan_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/how_to_reset_a_maytag_ice_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a3444c-361d-4ef7-ad9f-b9839bcfc2af/xasudidizesedokulawub.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/15230135133.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/begogoliwemisumitajenawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f680c6-8851-46de-9dbd-d2bb09972332/sogopatojuk.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/69001059730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62cb92c7-1788-467d-a6dc-be80bc85cda8/nowoxewuwanopinebe.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/3890460117.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_off000105af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AF 5504 bytes
SHA-256: b4fbbdc61e5803adb322add7bc5c1833af28d676baa7b1b1d6e2ea946b7fa3c1
font_01_sfnt_off0001185e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185E 10704 bytes
SHA-256: 4dae721ad51755e332391e24ff978f70433b98177d4fe7ff1a54978abcd3c4c5

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