Malicious PDF — malware analysis report

Static analysis result for SHA-256 324e3d0f1f255ef7…

MALICIOUS

PDF

72.5 KB Created: 2021-03-20 03:15:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 59fa8ea0bc5451a4ea98855c0bb7e17b SHA-1: 16d4ee6f85d8b7ef5c33ee8a8230fbbb9546aa95 SHA-256: 324e3d0f1f255ef72aca428b2a3e949c83d294c17b8ce12aeff18dcb7b47b9ae
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document's primary purpose is to lure users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=oxford+picture+dictionary+3rd+pdf In PDF document text
    • https://sifuparara.weebly.com/uploads/1/3/4/3/134352995/rofemixuzog.pdfIn PDF document text
    • https://tetiwaxope.weebly.com/uploads/1/3/0/7/130776033/69aeb8ca1.pdfIn PDF document text
    • https://cdn.sqhk.co/wukufazujuv/7K9hijZ/voice_recorder_software_for_pc_windows_8.pdfIn PDF document text
    • https://rewojomivatal.weebly.com/uploads/1/3/5/3/135345623/6c81963c3f9.pdfIn PDF document text
    • https://cdn.sqhk.co/ritapabinap/btSjhha/yuan_ti_character_sheet.pdfIn PDF document text
    • https://tojuxumisadef.weebly.com/uploads/1/3/4/7/134714483/talesizit.pdfIn PDF document text
    • https://rejezulibege.weebly.com/uploads/1/3/4/0/134018585/8714705.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/boduxatavepe/dungeons_and_dragons_character_sheet_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/free_lol_skin_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/honda_gcv190_pressure_washer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/donefagazosa.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_4553c1fe5d5b4d66bfc828bae1da0c10.pdf?index=trueIn PDF document text
    • https://7b9449e5-51e9-4a7e-81f5-8587c42320f9.filesusr.com/ugd/571bad_d7dec021397f4aa6aeb7636090ae5603.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/arkanoid_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67ef7b2e-90a8-482f-99fd-4cf868337a8d/starbucks_barista_starting_pay_georgia.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/what_is_the_purpose_of_project_management_institute.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/kinns_medical_assistant_study_guide_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ddd43e4-1c62-43fa-bc89-f4053fc27910/92475336132.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/perranporth_eyeball_surf_report.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_off0000ceda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDA 5184 bytes
SHA-256: efc290c25219e7903c03f87cb07ca8c6887d6146364db220b5551ddb33e1e49a
font_01_sfnt_off0000e09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09F 11604 bytes
SHA-256: da8cb74b39bb4ce7f20cda46cb69d9270158c597982b20e4dba25b82028f59c6
font_02_sfnt_off0001069d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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