Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d15f83a5ce14ce…

MALICIOUS

PDF

88.1 KB Created: 2020-12-17 23:48:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5a14127e2f06f00941145a8fba60c1d9 SHA-1: 94610706db21879588e288f8d8dac2319ea72cba SHA-256: 63d15f83a5ce14ce7533141fae6883f3563426d73153bd0ab47f143f4d688e5b
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links pointing to external resources, identified as a link farm. One of these links directs to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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 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://traffine.ru/strik?utm_term=complete+cast+of+father+brown In PDF document text
    • https://dakesepev.weebly.com/uploads/1/3/4/3/134308776/titobonuzirovorakunu.pdfIn PDF document text
    • https://pijezokonogoxa.weebly.com/uploads/1/3/4/3/134308979/jadiwanefun.pdfIn PDF document text
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/13164fd60426.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/105a881b-38d1-4e36-a465-b5a25d28a085/nexepakafa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37f170b6b03258f45d436/t/5fc3f9d51972c46e3c18e1ab/1606678997822/43182302424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9598609d-a1da-4e0b-9d03-5d6136bb0597/11_22_63_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a811d937-e00d-4cfb-8bf3-93d9e0eb73da/lisa_ann_club_cougar_steals_the_cock.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/arjun_pandit_movie_songs_pagalworld.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc555fff9866f3fd2f163c3/t/5fcd09e8e43f2b00a8ac60d5/1607272937082/minecraft_seeds_2020_nintendo_switch.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b348e5c7695ca9a14b85/t/5fcb694ca51c5a1401a957cd/1607166284993/kakokutupedisite.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce45288eda244dc4acbbd2/t/5fd604e80f11661d4c21b3a5/1607861481068/satarojododunafizes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd8cf55-ef06-4996-8495-11aef3ef620e/bollywood_movies_apk_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5915187b-202f-4a8b-bb82-3c3a5d3a84c8/3618524800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b2259e-5d96-44e2-b916-03d50a2c3e98/linear_systems_and_signals_lathi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C1 5392 bytes
SHA-256: dbb6823597985f0341a4122f940cbc7b7220b12f8d1cdae296c9b4db508a2172
font_01_sfnt_off000119f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F7 10532 bytes
SHA-256: f08e2ea02aba490e64f661c99b460412415a4afc429abf4f2b28d314e707de45
font_02_sfnt_off00013db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB0 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15

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