Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b8db4fbb4af6d1…

MALICIOUS

PDF

78.2 KB Created: 2021-04-07 16:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: da93ddb00a70a892ec7a884843c1bb7a SHA-1: 2dc50e79c993beccd9ca27b17fab9113ee9adebf SHA-256: 49b8db4fbb4af6d15a7f379993294ad849498809b64d586bc1fc1833b7f327fb
156 Risk Score

Malware Insights

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

The PDF file contains a link farm and an embedded URL pointing to a suspicious domain, indicating a phishing or SEO manipulation attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains a search query that serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=how+do+you+set+the+time+zone+on+a+marathon+atomic+clock PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444374/normal_5fff24022dbba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405922/normal_5fda8080f1032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_6054578f49c88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27da56d-6674-4187-903b-0dcd80037f0e/relel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/265e9894-8ced-41aa-b06d-b01a04640d37/xevonarer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26ecc5cd-c679-46fd-86a9-6b4aa978285e/65052588894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c510dc0-ee05-4aeb-a8bf-22e61772a7be/lowrance_elite_5_fishfinder_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c53267-d959-409f-9eb9-96f488d66f25/44697336519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952062a7-d908-48de-bc64-e1b7c29fb301/jobeseven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3deed622-ed4b-450c-8179-1ee982e7a8c4/marantz_cassette_deck_vintage.pdfIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_3f42affc781446e58c59af2081c7dbd0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d8efff0-47ac-42ee-ac65-2a0a6ffdd912/nora_roberts_witch_trilogy_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5306f0-a848-43ab-8010-6d9ce0e6dc73/how_many_ounces_is_a_dunkin_donuts_large_coffee.pdfIn PDF document text
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_1c76b9cd33f343bd8d3e8094a5cc486b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01443be4-ea74-4479-9f87-fe715badf30e/putitat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d9441f3-3f21-4c57-9428-347cdabb1cce/87459201965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/497df5f9-fecf-4a62-8de5-609e2bd67be1/wojiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e22fc988-b97a-489c-8296-663b9cbe398f/xinapifotulatevakuzakagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a18f4e82-5fb2-4e0d-adf8-4e526b143272/qu_es_una_metfora_y_5_ejemplos.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_off0000f11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11C 5448 bytes
SHA-256: a44720db6b4b7e22ec7df922971f587ea52612ffb78cc1fd8db687c292cb38f2
font_01_sfnt_off00010393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10393 12468 bytes
SHA-256: 70c29937fa63cd081d3cd2cbfea6e742d129ee7d1314d1fcccf4417de3c78f89

Open this report in the interactive analyzer, or submit your own file for analysis.