Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fa1af58c071168…

MALICIOUS

PDF

96.1 KB Created: 2021-03-19 18:36:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ff1c4bdd319eaa6cb9623ad48d3f7517 SHA-1: a30efe4a60d75244423e63e735318d47f08cedd4 SHA-256: 97fa1af58c0711687e67345d20a4fbbf0f40ef1824ecd6bd991bedd65d5504cf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it's part of a link farm designed to redirect users, with one such URL being https://druttle.ru/award?keyword=venice+walking+map+pdf. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/award?keyword=venice+walking+map+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500887/normal_602e82a27c122.pdfIn PDF document text
    • https://jaxoruxevag.weebly.com/uploads/1/3/1/6/131606876/8192308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488316/normal_601eca4e20417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410016/normal_602b989428154.pdfIn PDF document text
    • https://datugabow.weebly.com/uploads/1/3/4/7/134745554/wumufuxumak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388420/normal_5ffac6b3e75ed.pdfIn PDF document text
    • http://1xbet-registrat.site/wolf_among_us_apk_data650hq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427085/normal_60076ba2f11bb.pdfIn PDF document text
    • https://dunogijejuj.weebly.com/uploads/1/3/0/8/130813547/xuriwime.pdfIn PDF document text
    • http://simekavo.22web.org/vce_to_converter_online.pdfIn PDF document text
    • https://dasasaperot.weebly.com/uploads/1/3/4/6/134665710/cf53661.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/sighaxed_firm_file_not_foundipxpg.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://uploads.strikinglycdn.com/files/7a21d760-45e8-40de-83cd-5effa7f0aba3/sharper_image_bluetooth_earbuds_review.pdfIn PDF document text
    • http://poresiz.epizy.com/mivusabijukobixuxupumo.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/89157070282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/567dba33-ab9d-425c-9cbc-89180d5e276d/regotitejetexesuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd11101-44e3-4afa-8b54-f84a242ba0d2/nigalakezibubunesujanuj.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/2007_jeep_grand_cherokee_srt_interior.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bc18277-deba-4c23-8cea-da1b8ff28ee4/what_is_the_most_recent_dresden_files_book.pdfIn PDF document text
    • http://tikolikenugim.epizy.com/isolation_of_aspergillus_niger.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/71998813151.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_off00012e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E26 4920 bytes
SHA-256: affc8478ed17ab8f79a0bf6caa3691c28f8c10e794d042ce15a6b9252828dd14
font_01_sfnt_off00013ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EDE 11464 bytes
SHA-256: 65dc098a0ac708153cda140531bc94db6d48690172e3b828ba6b66ababee1b2e
font_02_sfnt_off00016522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16522 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2