Malicious PDF — malware analysis report

Static analysis result for SHA-256 b732d38cb9d17c1b…

MALICIOUS

PDF

66.8 KB Created: 2020-12-21 19:35:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 625b0d6c1da2444ed6a65936fd6b81b9 SHA-1: 173cf61ae234de17213baec507e517a1911d4496 SHA-256: b732d38cb9d17c1b4493583b5fe111fcbefd8c8541e2c52b97b209769e4d158a
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 primary URL points to a site that appears to be related to a movie guide, but the overall structure suggests a malicious intent to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification. No scripts were extracted, but the PDF structure and external links are indicative of a phishing or malware distribution attempt.

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/aws?utm_term=the+tall+grass+imdb+parents+guide PDF link annotation
    • https://fipaziditude.weebly.com/uploads/1/3/4/4/134465794/4695768.pdfIn PDF document text
    • https://gazumewus.weebly.com/uploads/1/3/4/9/134901575/bemipirulepawumenira.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/xirujo_vunesuki_bugeda.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/bejexe/frozen_let_it_go_sheet_music_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7bc2ea4d75e5252f6a625/t/5fc87de826a3037b433da9fb/1606974957196/download_game_total_conquest_hack_java_240x320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c51ca76c-68d8-4c02-af11-059a1d76e726/sulozati.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/microsoft_word_vocabulary_quiz_and_word_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77bded32fb7060d121cb3/t/5fcd3490d336b863f0cd3e7f/1607283858042/61100161190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1aec0a-119d-4d9d-abea-9f9a1d95b8a0/35394627474.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/fuposolimexujeguxi.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/indian_public_finance_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507e7c3f-f587-4916-a63d-6ad55486ef7f/34904598544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f00dea-5d0e-4777-890d-d9fd9ff447cb/66356439351.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_off0000bbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD5 5236 bytes
SHA-256: 37b74a1c9ecad7da9a75ceaa145a95981a133dba6287314b182271dc763273ee
font_01_sfnt_off0000cd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD67 10156 bytes
SHA-256: f85ab1814e8a0345d77b83b1752f313aa6956c70d30a023931074b2a54e87f08
font_02_sfnt_off0000effb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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