Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0da62ea2657f4bb…

MALICIOUS

PDF

82.5 KB Created: 2021-05-24 08:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4f06eda0e38e2d61fec01c216d76a9e9 SHA-1: d8127679646f784769d557263d3dad39b9ccbd52 SHA-256: b0da62ea2657f4bbce961edfea54fad4056bc1fda7a7f8f9408d741275588341
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://dugedepap.ru/strik?utm_term=how+much+do+indian+tv+serial+actors+get+paid PDF link annotation
    • https://tixosame.weebly.com/uploads/1/3/4/5/134523113/1329095.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481068/normal_6061873088e56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388279/normal_603484c63dc21.pdfIn PDF document text
    • https://tesazosutev.weebly.com/uploads/1/3/4/7/134714215/ralagijij-dolufigiwodis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366652/normal_5ffa1623cf0b3.pdfIn PDF document text
    • https://wigufigavotafo.weebly.com/uploads/1/3/1/4/131452860/5812725.pdfIn PDF document text
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/f5d3e3cb44ad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528959/normal_605a258a58ca2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/types_of_modifications_in_the_classroom.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/toefl_practice_test_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/hawaii_5_o_episodes_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/aplicaciones_para_control_de_finanzas_personales.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/kovarixezexawexajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff78899c-5adb-43d1-ab67-87b0cfa18109/fawumopeve.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/historia_de_mexico_unam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71514da-0b2f-4b86-b60d-a87c304dbcb2/badunewuwukifapabore.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/busidixenib.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/christian_song_tagalog_free.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_off00010303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10303 5600 bytes
SHA-256: bf97a3db1e8bdcf9c1e87f6ed4fc24b96d5c0b82469fc1dbbebb9bec42108255
font_01_sfnt_off000115f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F4 11452 bytes
SHA-256: 73af67dd2072c7f4a651277c8caf19861047504513156147b2c416412252ddaa

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