Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b06a8e1ff73790c…

MALICIOUS

PDF

67.0 KB Created: 2021-03-05 01:10:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05e839066b89f5b3af1d4cc959c1b869 SHA-1: 61e6963bed240dd16ba55924e46426c290bbf734 SHA-256: 2b06a8e1ff73790c832d1bb75f4d11e62052dd851cd7cf45eabdafadb457f74e
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, directing users to numerous external websites, including a known malicious redirector. The primary purpose appears to be to drive traffic to potentially harmful or phishing-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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.
  • 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://crophysi.ru/123?utm_term=danby+designer+3.1+cu.+ft.+dual+door+compact+fridge+with+freezer In PDF document text
    • https://ravaratu.weebly.com/uploads/1/3/5/4/135401011/xikulefefogeboj.pdfIn PDF document text
    • https://tomovomat.weebly.com/uploads/1/3/4/6/134617768/ritubobipuf.pdfIn PDF document text
    • http://bosuloridulumo.22web.org/jason_bourne_full_movie_480p.pdfIn PDF document text
    • https://fosuwelu.weebly.com/uploads/1/3/2/6/132695698/mitoj.pdfIn PDF document text
    • https://nojugebi.weebly.com/uploads/1/3/4/3/134321301/6bd23264e89.pdfIn PDF document text
    • http://guwelureg.22web.org/aws_kubernetes_tutorial.pdfIn PDF document text
    • https://kazimiposaduvab.weebly.com/uploads/1/3/1/1/131163956/ea7c2a38.pdfIn PDF document text
    • https://kaposabebozof.weebly.com/uploads/1/3/4/4/134466843/4b96fd485aa.pdfIn PDF document text
    • https://gajebafanagifim.weebly.com/uploads/1/3/2/8/132815836/digeruzabage_dolasakej_gonedeparalinu_kedasukuxate.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/68775809-7e82-4570-99a8-21a9cb426903/mechanics_of_materials_5th_edition_solutions.pdfIn PDF document text
    • http://kafafisizufol.rf.gd/23374219373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc24828b-6cb1-47cb-bcd2-671918c853e2/bimibasitezexagutap.pdfIn PDF document text
    • http://kediditu.rf.gd/99277184915.pdfIn PDF document text
    • http://dalonirutufitad.rf.gd/negative_exponents_worksheet_1_mathworksheetsland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6621242b-f606-4aef-ae72-dc24251a9171/26419583243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88dc5712-1bed-4dd0-b738-05ad5df095a9/fudejo.pdfIn PDF document text
    • http://kofujuluzode.epizy.com/jodosegipu.pdfIn PDF document text
    • http://gisinazujawapub.epizy.com/59116914633.pdfIn PDF document text
    • http://xejarejunap.rf.gd/22687955013.pdfIn PDF document text
    • http://fibalikirikoti.epizy.com/14475237671.pdfIn PDF document text
    • http://veboluzamusi.epizy.com/97422480425.pdfIn PDF document text
    • http://zabusokaruzovi.rf.gd/instagram_story_icon.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_off0000c873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC873 6200 bytes
SHA-256: 77a335ea0e721c7cdbf2e9d4129d1d0bb55f8e64cbacbb687e5e53566a94fd53
font_01_sfnt_off0000dd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8F 9508 bytes
SHA-256: 3b94329db6b49febf6aa5f9be7c98865f2e327259451d97b9a7a913fd689657f