Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba78d3d3a3e976fa…

MALICIOUS

PDF

93.7 KB Created: 2021-04-04 05:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5db99b3a18be74fdf73adeba4657a701 SHA-1: 7f3cdd5bfa48b90edd9afcf79788ae132fbbf314 SHA-256: ba78d3d3a3e976fa26056e0e5c00f8985f2ade04cda2b43ec0d2eaf139689684
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO farms or phishing. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

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://kuzutuzo.ru/award?keyword=international+maritime+signal+flags+pdf PDF link annotation
    • https://jaradaka.weebly.com/uploads/1/3/0/8/130813635/5f2ca6d9.pdfIn PDF document text
    • http://xolokukifimiv.sportsontheweb.net/14521032433.pdfIn PDF document text
    • https://japafapu.weebly.com/uploads/1/3/1/4/131437770/2105244.pdfIn PDF document text
    • http://storedubai.shop/xamumimk9pwj.pdfIn PDF document text
    • https://mogavibebeza.weebly.com/uploads/1/3/5/3/135318512/40c14f06e48c1.pdfIn PDF document text
    • http://jirafka.space/instructional_materials_service_animal_science_answersnt07f.pdfIn PDF document text
    • http://robinmani.site/who_plays_margaret_in_sense_and_sensibilitychcz0.pdfIn PDF document text
    • http://stixlife.info/867072216416c6do.pdfIn PDF document text
    • https://punoburewi.weebly.com/uploads/1/3/4/3/134305970/5468411.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/zavuwetixuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://merapenerabari.myartsonline.com/pals_virginia_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/hypertension_guideline__facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/the_basic_practice_of_statistics_7th_edition_launchpad.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/sinamurevazobuw.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/bash_script_comment_line.pdfIn PDF document text
    • http://jomopizemiz.onlinewebshop.net/gulajaxamelojemixakot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a06811c-f11a-4a94-8907-b71626dea8a1/oraciones_al_espiritu_santo_catolicas_cortas.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/setipuropenozevesiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d00a78b6-aff8-4cb3-877f-6fa068e13437/9322335353.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/wonder_woman_bloodlines_2019_movie.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB8 5296 bytes
SHA-256: 127b72b83dd998b68704db8686d1b3879855be0e0f29c47f2eae868ce969feb9
font_01_sfnt_off00012d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9A 6148 bytes
SHA-256: 488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d
font_02_sfnt_off00013d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D7A 13512 bytes
SHA-256: 591a818cf4250c906b338fe85db34071a4d248ea2fe00e6c3cc34a1565bfb0ba

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