Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc680d8a276f509…

MALICIOUS

PDF

73.8 KB Created: 2021-03-04 11:19:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6aa1d2d8a48e8612378dc46387bd9f7c SHA-1: eb8adfd1189cf22edd84ae655609d9856b0c0cb7 SHA-256: 6dc680d8a276f509917f55435164aa4145bf5d9833725b812cbbf9c2fc5692d9
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with at least one identified as a malicious redirector. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document is designed to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the nature of the links and the ML classification point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://yafferge.ru/123?utm_term=el+cantar+del+mio+cid+pdf+descargar In PDF document text
    • http://luwogexejel.getenjoyment.net/who_owns_the_lysol_brand.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/best_location_for_antenna_amplifier.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_603a3dc978815.pdfIn PDF document text
    • https://jolosusopafo.weebly.com/uploads/1/3/4/0/134097145/zisekapepi.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/feeling_words_that_start_with_e.pdfIn PDF document text
    • https://jafusakivamo.weebly.com/uploads/1/3/0/7/130739280/mogabekirurevilap.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/jafevejusomerinejuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385228/normal_6007fe2ac0af3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474450/normal_5fcf665662de2.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/how_to_connect_directv_box_to_smart_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459794/normal_5fe53cd2466e2.pdfIn PDF document text
    • https://retotanenumu.weebly.com/uploads/1/3/4/0/134017544/7625019.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/stihl_ms180c_chainsaw_manual.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://s3.amazonaws.com/kitakilesa/lofazodinodulinadenopel.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/49199276509.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/smd_capacitor_size_guide.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/how_do_you_reset_voicemail_on_alcatel_flip_phone.pdfIn PDF document text
    • http://jemileti.atwebpages.com/total_gym_1000_abdominal_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/89452537260.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/how_to_turn_on_cuisinart_14_cup_coffee_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/blumax_speed_charger_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/kosozanuwukikegexikosut.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_off0000d4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C2 5220 bytes
SHA-256: 9c9bacfe9d9ec7362fff238acd27dd99f1205f363255c70d2a69f517e7c0750e
font_01_sfnt_off0000e667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE667 10972 bytes
SHA-256: 6f69a808441b96c7e4de644b73b0cbbb453e48f4933665562f44605d0591dcec
font_02_sfnt_off00010a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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