Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7580c0af3915c80…

MALICIOUS

PDF

70.4 KB Created: 2020-11-10 01:08:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7e62f066b7f4d7e08a12ace6c50b96f2 SHA-1: cc1ac1890e30010867f0eaf9815b30f740ed311e SHA-256: f7580c0af3915c80088715a644046fe72bebb775a63897abee60fd4743179b75
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. No scripts were extracted, but the presence of malicious links is sufficient evidence for this attack pattern.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?keyword=what+is+wsd+port+on+a+computer In PDF document text
    • https://sonedolab.weebly.com/uploads/1/3/4/6/134630530/mokef.pdfIn PDF document text
    • https://kimiragijasem.weebly.com/uploads/1/3/4/0/134096233/b699f1.pdfIn PDF document text
    • https://lowijagaji.weebly.com/uploads/1/3/4/3/134394878/xizewija_lanugizol.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/063d101d-d4bd-4a31-a797-92c62e6b0a91/jinorerazonurolafikefi.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/year_without_a_santa_claus_soundtrack.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/amsco_apush_review_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/game_of_thrones_books_box_set.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/nikon_coolpix_l310_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/metro_df_mapa.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/66192750279.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/notary_signing_agent_jobs_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/acanthophora_muscoides.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_off0000c856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC856 5268 bytes
SHA-256: 797833f1a15978125ffb96cf4977dcda3bb9d0daa1d9bda37b2de5dde46c9634
font_01_sfnt_off0000da20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA20 10544 bytes
SHA-256: 0a21bf26f7caca5a373d10c47df9a47d52282d4633b80addb981c7a3740c1a90
font_02_sfnt_off0000fe4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4B 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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