Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e467aacdee1730e…

MALICIOUS

PDF

72.8 KB Created: 2021-03-23 21:06:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: bd8513dd915b7ee1e724d9664b6d3391 SHA-1: ec029bd0b2a3f043cda8b8975c523aa95c525e36 SHA-256: 9e467aacdee1730e535223d4cd3c2cdd0084b41f86cbf6f070dca1398570c74c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which point to suspicious domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains keywords related to 'answer key' and application metadata, likely serving as a lure. No scripts were directly extracted, but the PDF structure itself facilitates the hosting of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/wix?keyword=wordly+wise+grade+8+answer+key PDF link annotation
    • http://akb54.ru/implementing_the_iso_iec_27001_isms_standardnze54.pdfIn PDF document text
    • http://gratoraama.space/5861028446s12ik.pdfIn PDF document text
    • http://kprovk.xyz/scientific_conference_presentation_templatesujk3.pdfIn PDF document text
    • http://rusakova.space/smugmug_coupon_codej6chy.pdfIn PDF document text
    • http://teachost.com/tokyo_ghoul_manga_volume_12589vus.pdfIn PDF document text
    • http://knitfqph.site/737645613589fozj.pdfIn PDF document text
    • http://moviesaddaa.online/nubinemad6z16.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/kovilowab/instagram_design_template_app.pdfIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_f50455e3be064c6b915cde6132c221f2.pdf?index=trueIn PDF document text
    • https://e924225a-aa46-4bfc-8e56-7341551e1833.filesusr.com/ugd/54dfea_6ffd376a25bc4f81b139628a27c612c9.pdf?index=trueIn PDF document text
    • https://8be317c1-93d6-4444-9a1c-030c84ae583f.filesusr.com/ugd/709942_0146451d3a0b4d81877240ec0de24a72.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/asp_net_mvc_5_tutorial_w3schools.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/sukox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e297ffbf-5741-4166-9eb0-c81a5f7d6611/how_to_put_a_belt_on_kenmore_dryer.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/kimezina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e1e16d1-8f72-46db-8fa8-413648a1444b/personajes_secundarios_de_la_metamorfosis_de_franz_kafka.pdfIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_1b490f8c67504a6f801c4707ee13f67f.pdf?index=trueIn PDF document text
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_e1fac580d1634a7591f15e37c4fe26be.pdf?index=trueIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_3e41696035a044c2bd42bcfcd10857e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rorives/35748597239.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_off0000cf9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9B 5164 bytes
SHA-256: f2a0a4d0b22caabdbb95d2869c7328906dcc0a29dc0a50a90330fa78825bf0b0
font_01_sfnt_off0000e14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14A 10796 bytes
SHA-256: 210f44b7460623285b238a742a6642a943494610db6409e60e503860e977808b
font_02_sfnt_off000105ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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