Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11310304ee30297…

MALICIOUS

PDF

71.8 KB Created: 2020-12-16 15:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 31794a86caee175b6fd6d5d844bc01f2 SHA-1: 2a0d07f4a8f5f0adcc78059535c74041621f1018 SHA-256: d11310304ee302971a5b1c1f2ba2b88ae5e17c03334d16640337d829ed536847
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though heavily obfuscated, suggests a lure related to 'Diary of a wimpy kid rowley and greg'. The presence of external URIs and the PDF_SEO_LINK_FARM heuristic strongly indicate a phishing or malicious redirection attempt. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=diary+of+a+wimpy+kid+rowley+and+greg PDF link annotation
    • https://fowidejufato.weebly.com/uploads/1/3/4/5/134582967/dorinubedoli-buzebebagagag-kumopavopedopas-jometew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388178/normal_5f9bd89290d65.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/vijodi_nefojoraz_tobugodudusim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5fd1c33878d5a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8119fcb0-3e5c-4c82-8e4e-c5116909b9b9/thv4_coral_indicator_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10523b8467722f1d4eb82/t/5fc592b8173fb5383b629b43/1606783672965/dragon_genetics_understanding_inheritance_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6a439ee0f32b874c28a4/1606380100526/lixixuroneb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0879da3bf4b14aba759f2/t/5fc141ae9d79364840bb9e13/1606500783115/manuale_casio_a168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea85f0c2-419a-4977-b5e4-7328b1ff36d2/11484226191.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfe613f75b166439b5de3/1606286945993/akashic_records_of_bastard_magic_instructor_manga_volume_7.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00570a3bf4b14aba44e61/t/5fc48a96bc819f1cf469ee94/1606716055089/everett_housing_authority_waiting_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc576fd8139af037663e8f6/t/5fd1f77eb91f50015ef1d7d1/1607595902966/85454001920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f532c528-85a1-4013-a80f-857292a5e5b8/5315567736.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4daea8787e879898531d2/t/5fc6516361e25426e10f2f3a/1606832483928/jaxowumiroteparab.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_off0000de4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4D 5440 bytes
SHA-256: b04872f647479c0f4b13fb6a339c848568900288b80b51e6a68d68dc52bd1f15
font_01_sfnt_off0000f0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E4 9852 bytes
SHA-256: f20af74579cc8cb147da7e49fc56ac96c0428e3ab32755ea197b3b101049cd58

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