Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c354e723febc54…

MALICIOUS

PDF

75.3 KB Created: 2021-06-11 05:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3d8a690f00a854f0f3dcacbcacd6269a SHA-1: e61045d586d6f7712a7a9e09fe6d73ff9a149570 SHA-256: c3c354e723febc54b55d0de88fbc4c127e1241bb33aff414a81a1c626e2fa75a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users to potentially harmful content. While no scripts were explicitly extracted, the presence of external URIs and the overall structure strongly suggest a phishing or malware distribution vector, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://allytemp.ru/pbw?utm_term=small+comprehension+passages PDF link annotation
    • https://dagevonedil.weebly.com/uploads/1/3/4/7/134736192/jebam.pdfIn PDF document text
    • https://xuwazoleludike.weebly.com/uploads/1/3/4/3/134325396/sixojefaw.pdfIn PDF document text
    • https://fugazuxelodurip.weebly.com/uploads/1/3/4/6/134639195/14061f528a.pdfIn PDF document text
    • https://lazetulomobepi.weebly.com/uploads/1/3/4/3/134326787/7f7c947fd4ca4.pdfIn PDF document text
    • https://kaminuzud.weebly.com/uploads/1/3/4/7/134705180/gixigekibiwuwekedule.pdfIn PDF document text
    • https://xogedagiwen.weebly.com/uploads/1/3/4/3/134398587/kexune.pdfIn PDF document text
    • https://gorasugaki.weebly.com/uploads/1/3/4/7/134766712/noxiwadega.pdfIn PDF document text
    • https://didejigoximatex.weebly.com/uploads/1/3/1/0/131070501/814872e035e6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gazumadu.pbworks.com/f/real_bet_vip_correct_score_apk.pdfIn PDF document text
    • http://sikawejedi.pbworks.com/w/file/fetch/145102326/46215173899.pdfIn PDF document text
    • http://gexufak.pbworks.com/f/negapam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15f8d4ea-e3d9-4fd1-8ad3-9532e68fe343/dr_joe_dispenza_wikipedia_espaol.pdfIn PDF document text
    • http://mojuseraneno.pbworks.com/w/file/fetch/144657804/88271732007.pdfIn PDF document text
    • http://sujagajo.pbworks.com/f/84734760589.pdfIn PDF document text
    • http://tirotibixup.pbworks.com/f/xekekotonigosofufiduwaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fcb28dd-c6d3-4111-84f7-6218d6667776/algorithm_flowchart_and_pseudocode_examples_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dee77b0-b2d5-4089-92ef-0de6794c4be9/why_you_should_own_a_dog_persuasive_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ef2d0a-7328-4e43-af17-c936dceed814/68552430402.pdfIn PDF document text
    • http://feselikebapu.pbworks.com/w/file/fetch/144745710/sonic_classic_heroes_free_download_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975a8b62-a7e9-4b4b-8464-222c6650f3bf/ali_baba_forty_thieves_story_in_urdu.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_off0000ea5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5A 5448 bytes
SHA-256: 9db7479c11b2b14e6a3045755f7a0f03a457cbaf4360dffc6ccdf5f5c8d0fbae
font_01_sfnt_off0000fcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB1 10676 bytes
SHA-256: ce25d0d8d2a5ed25affd28a27b7d3eeca76ecc8974450b8fdc65092b693107d2