Malicious PDF — malware analysis report

Static analysis result for SHA-256 611e33e85b52b5be…

MALICIOUS

PDF

74.5 KB Created: 2021-04-02 14:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a53d95e120f0e51bf7fc960b93642c81 SHA-1: b931c781a4fea076a27edc67c2d7a1f3328c6922 SHA-256: 611e33e85b52b5beee441e69ee7fef6c82ba397ae918103e506ddec319dfb5b3
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm and an embedded URL pointing to 'jottigo.ru', suggesting a phishing or malicious redirection attempt. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains fragments related to a coffee maker and the wkhtmltopdf application, which might be part of a lure to disguise the malicious intent. No scripts were extracted, but the presence of external links and the phishing detection strongly indicate malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=hamilton+beach+flexbrew+2-way+coffee+maker+not+brewing PDF link annotation
    • https://fadexawotizetav.weebly.com/uploads/1/3/4/3/134339615/zotapatevuvozituzu.pdfIn PDF document text
    • https://memudodonimik.weebly.com/uploads/1/3/1/4/131406547/sidutojuzutolok-vuxofer-zilojafoxeruk-wagogitefobigo.pdfIn PDF document text
    • https://bazopozetera.weebly.com/uploads/1/3/1/6/131637116/4891346.pdfIn PDF document text
    • http://latencfsrt.space/pugipigirupoganoa8510.pdfIn PDF document text
    • http://silver35.ru/bahubali_2_full_movie_free_480pwn9xa.pdfIn PDF document text
    • https://gomimujetaveve.weebly.com/uploads/1/3/1/4/131406784/a370b896.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/pafexegud/dpsa_circular_11_of_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/adobe_lightroom_apk_full_preset.pdfIn PDF document text
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_552686721e664e9d8a8610bc00259a51.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/drone_risk_assessment_template_uk.pdfIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_18502b3dfa59499aaa046ed46d384210.pdf?index=trueIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_78f22bd4d75f472888fe4a611f7415a9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megelugik/one_page_template_bootstrap_4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/family_feud_board_game_walmart_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6506173b-bdc9-49cd-b1c9-daea371dac5d/bupijerijabiwozifovos.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/best_hd_audio_songs_site.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a786d2c3-1494-43d0-862f-def14ee8ef4e/where_is_the_ip_address_on_a_canon_mx490_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c6ec09-0ad7-4663-9af3-3202435f95a1/toro_power_clear_721_qze_oil_change.pdfIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_8f3c1c318e2149a2aa468ab625289baa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28eed574-b1ac-4e4e-bd29-44f9477a1f28/me_before_you_soundtrack_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/night_owl_camera_stopped_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c000e63-c2a5-4090-842f-72b11db15dca/pirizifixit.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_off0000e4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C5 5708 bytes
SHA-256: 67c29c14d99ff292eae4c6272a161c172985756efce3738fed31ef235bb33b6b
font_01_sfnt_off0000f832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF832 10608 bytes
SHA-256: 49522c01eec4e2bc9754d249c7925729f0ff3219aadfaeebff340b25a0f3fc02