Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a809953f19cbbe1…

MALICIOUS

PDF

82.1 KB Created: 2021-03-13 13:31:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 3060b9de4f28beba5cafc3f5aa9f3e7a SHA-1: 9155c69b60eace830340469ac1ccc872ea22da8b SHA-256: 9a809953f19cbbe19fb391e57ed119de3847c123d94c6b5299a77a6941fc5efd
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to disposable domains and potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ClamAV detection and ML classifier also flag this file as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious sites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/wix?keyword=arte+barroco+pintura PDF link annotation
    • http://bloodcraft.online/savage_worlds_rpg_system7s2fg.pdfIn PDF document text
    • http://cosmeteca.com/peggle_blast_how_to_get_long_shotsyyrdh.pdfIn PDF document text
    • http://voicebftyi.com/7628249110956zhi.pdfIn PDF document text
    • https://bisadujepuza.weebly.com/uploads/1/3/4/4/134444209/1e82d9086.pdfIn PDF document text
    • https://zesijijonade.weebly.com/uploads/1/3/0/7/130776416/wubajutij_vopawupilesilu_vogizema_kamifurog.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/38825121420.pdfIn PDF document text
    • https://jiparebifipi.weebly.com/uploads/1/3/4/6/134638028/5198342.pdfIn PDF document text
    • http://avto-document.site/21193996259exac9.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/7699fc6c-8f40-43c1-b554-30d1f33f3fb1/totukobipefugamabekexivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/818da91e-4806-4a03-9c70-336facc6bab9/tutunevatefavazolevoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad9be0fa-1e51-4ece-9712-6827caf1d24c/nelowigesolapupev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/437856b8-b4f7-40db-9b06-65b6e06bde7d/29511905988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee7ffdf6-260e-4ce5-85c3-66289ac7d698/what_is_english_101_like_in_college.pdfIn PDF document text
    • http://xuxalonitu.onlinewebshop.net/asp.net_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58cadc04-e1f9-4666-8346-04239d2f2d81/south_america_longest_rivers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7990844-0dcf-4321-94c0-ac35b7fb88da/96851122769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc3193c0-9505-42bc-9922-2ecf18942b8f/what_tvs_are_4k_120hz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbcda272-6b4a-4de6-aab4-567829f227b1/associated_legendre_polynomials_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eca75d18-7cd1-41ba-9245-c668391965cb/the_little_red_hen_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ce6498-d4d4-4395-bf9d-72d03d763462/pro_form_tour_de_france_spin_bike_review.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_off0000fff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF8 4844 bytes
SHA-256: c22bc32280bfd51e307d4e565704f2bd14a91f1caf097681cab53e67dbd95d6a
font_01_sfnt_off00011081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11081 13436 bytes
SHA-256: 0d332366863a124d1dfab055c2aed6854a0345b24fc432183acc6c8784cbfd19