Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d0964841da1959…

MALICIOUS

PDF

75.2 KB Created: 2020-12-13 22:46:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 500082d45b8ce4e73db160fa27edd61c SHA-1: 16c2dcd5e03aa91ab268a934ae63fad524240632 SHA-256: 54d0964841da19594d1de7cf5364e1c26b9f5a045936c4043e92d9f0f4b7ef60
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are to benign-looking documents, but one key URL, 'https://trafficel.ru/aws?utm_term=apulien+reisef%25C3%25BChrer+pdf', is associated with malicious activity. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to distribute malicious content or engage in SEO poisoning. ClamAV detection and ML classification further confirm the malicious nature of the file, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://trafficel.ru/aws?utm_term=apulien+reisef%25C3%25BChrer+pdf PDF link annotation
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/gugivi-xigovodikon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409814/normal_5fb61fceb9928.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/xelorazemavoxawajano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498997/normal_5fb8d36494eac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc518baf9866f3fd2ef1438/t/5fd1a292eeaf2774ac899cb6/1607574165619/download_strikers_1999_saga_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce2449c2968904bcc6d1a1/t/5fd224ce9a9e5443ac8343a1/1607607503561/within_movie_full_plot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6aca8eb-43e9-47a8-900f-7f9a9cc533e7/34715343265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/624bb5d6-dca4-4231-a03f-ebbc4aedacbe/schwing_stetter_batching_plant_cp30_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e0c67848ba205d186e02/t/5fc100eef81c9a2a0cc5d206/1606484207180/unblocked_games_tennis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9ad2a60-8bbd-4a8d-8f53-f832bee1b7df/damififok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87047583-dc24-4717-ae5d-14a144aa5bd9/the_lost_world_michael_crichton.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc284201c8c7413143c29cf/t/5fcf54930ff3944fc5582e84/1607423124094/teach_online_college_courses_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f159a894-1693-4589-91b7-e7b3b5e7e837/gizijodokuvero.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd745bcb0228a2824d01/t/5fc0f28d7acac6192ae31109/1606480525664/nibakefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd0830b-f623-48b0-983b-abe1d30ccc76/dichotomous_key_worksheet_answer_key.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_off0000e689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE689 5028 bytes
SHA-256: 8951166f49b1d944b3c95ffdc62969f30029f000d90083726026be74c567cc1b
font_01_sfnt_off0000f768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF768 11932 bytes
SHA-256: d77e94d7f74b8051a6f292169cb153dccc0d5956bfb540bfa3c7776f072d4655

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