Malicious PDF — malware analysis report

Static analysis result for SHA-256 99bbb0ce48a2387e…

MALICIOUS

PDF

71.1 KB Created: 2021-03-21 09:27:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1e693d34ba6d0120259a11678aa4f28b SHA-1: c5946ee3b2c6ba989dd4603b65cea677caedc924 SHA-256: 99bbb0ce48a2387e6e09c948e357f48cac2e815ad1481b589edda2f592848102
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to a URL that appears to be part of a link farm designed to attract traffic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and the presence of many external links suggest it's designed to redirect users to potentially malicious websites.

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://baarspo.ru/award?keyword=alberta+conservation+and+hunter+education+manual+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454822/normal_6004688d06023.pdfIn PDF document text
    • https://joxalazugadono.weebly.com/uploads/1/3/1/4/131437099/tikekemive.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413987/normal_600b0eca75cae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411500/normal_5fea2e153892e.pdfIn PDF document text
    • https://fimopoki.weebly.com/uploads/1/3/4/0/134040487/puxulejepazex-wuluz-jexul-xiratodul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5fd8afde34e8d.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/fejakixoweka/55871343234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8c806f-0488-4f42-a4d3-954a2cdace30/who_makes_ariens_mowers.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/top_ten_video_editor_android_app.pdfIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_d4736598d1a54ed28b0738056b050671.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b0f23f-7f89-47aa-9a54-f515d4db53e2/what_are_the_curriculum_areas_in_early_childhood.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/69674382781.pdfIn PDF document text
    • https://2a082fd4-e93f-4b8e-9e59-408fa046b31c.filesusr.com/ugd/e334dd_a818ac13525f47ceae09728ee489ec00.pdf?index=trueIn PDF document text
    • https://27bb44de-5fc1-4955-8ba4-e424e968c2b6.filesusr.com/ugd/e54fc7_a678f3d6f2bd45a785815d3c5f01ee27.pdf?index=trueIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_ca9741f027904ba49dc5be96c71a7ece.pdf?index=trueIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_4fa2321e6cd24a39ac52db3834c6a7b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/pichuva_kaththi_movie_tamilgun.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/fulisekefosojuxinudus.pdfIn PDF document text
    • https://9f2a6cc1-6e15-4467-beaa-57274ca996ed.filesusr.com/ugd/78f4c3_2205031602c1417eb182d2e76c0643ce.pdf?index=trueIn 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_off0000c975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC975 5464 bytes
SHA-256: 5898562ca186edc725db16ae97358b2aa6c0b8bf009829ac482bf235d8d5cd88
font_01_sfnt_off0000dbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD2 10736 bytes
SHA-256: 628a004081d77a97f027d095845de13f1e4d387bf7749453231bf4fba413efb6
font_02_sfnt_off0001008f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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