Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac7df91c77f816b…

MALICIOUS

PDF

70.3 KB Created: 2021-02-24 23:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 8366c84288948f339a115d862c91df14 SHA-1: 64e0630f78e8ae9a0f2c12a5d44ad825b4163e9d SHA-256: 1ac7df91c77f816b970629e6466f5d773cf7b2dbfc1d3a1988dbcd978fb6e9aa
184 Risk Score

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 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.
  • 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/award?keyword=read+theory+analogies+3+level+8+answers In PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/1c44fe72b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449001/normal_60199b83904d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_601aa8b3c35b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405903/normal_5fd1863b1cacf.pdfIn PDF document text
    • https://sefusozikoju.weebly.com/uploads/1/3/4/3/134366316/15f5d.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/can_i_substitute_vinegar_for_keurig_descaling_solution.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/78606878310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_602345bfee520.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/zogununiromawupubulugen.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/fedoxojig.pdfIn PDF document text
    • https://josapepukixo.weebly.com/uploads/1/3/1/3/131384602/xolenez_tiwomowokeber.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5fe82c9678dd4.pdfIn PDF document text
    • https://sazaburesifug.weebly.com/uploads/1/3/4/2/134265765/7699941.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/xevatiwitepekujiwatefat.pdfIn PDF document text
    • https://nikatomorufaxeg.weebly.com/uploads/1/3/1/4/131437252/4602593.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/10537073977.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/dope_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/aplikasi_bobol_wifi_tanpa_root.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/53203850138.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/aranesp_dosing_guidelines_for_mds.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/42894759808.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_off0000d4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EC 5708 bytes
SHA-256: a053da86d6c85ea4e956063bdb0b5561d279e42d715fb65c22874562675dbbe1
font_01_sfnt_off0000e86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86F 10400 bytes
SHA-256: d2c733c8e71b3fe7447aec19b7b1ecbc78d15cb51548fbd6fa23b06cfba9ee19

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