Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69a6c57abc7bf93…

MALICIOUS

PDF

87.7 KB Created: 2021-03-30 04:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bbc35d24a95c8843ed6b52a68a967aeb SHA-1: d4862b33f8dfddd860c4d75e4f48e08c7e5b3f9a SHA-256: e69a6c57abc7bf936959f088ef358ff924bd4c8b4c86dd835aa496a12c2b5319
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document exhibits characteristics of a link farm, containing a significant number of external links, many pointing to disposable hosting services. The presence of a known malicious redirector URL and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely to lure users to malicious sites or distribute further malware. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/award?keyword=ncert+beehive+class+9+pdf+answers In PDF document text
    • https://wawupibinotab.weebly.com/uploads/1/3/4/9/134900246/83cc0699e3ab.pdfIn PDF document text
    • https://vimavopama.weebly.com/uploads/1/3/4/7/134769365/7301597.pdfIn PDF document text
    • https://lepujipalojim.weebly.com/uploads/1/3/4/5/134599636/3857b.pdfIn PDF document text
    • https://fezadegijowazon.weebly.com/uploads/1/3/4/0/134096780/xataseneramo.pdfIn PDF document text
    • http://mimudobaros.22web.org/how_to_crochet_a_granny_square_left_handed.pdfIn PDF document text
    • http://nupazoz.22web.org/32862834424.pdfIn PDF document text
    • https://riwusivi.weebly.com/uploads/1/3/4/9/134900433/3509771.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tipakixulo.rf.gd/keto_breakfast_cookbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35499c5d-caaf-4088-8dcb-5a3c8029e7b1/38722224847.pdfIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_a3adf61939fc41178ebac12ab63a55ab.pdf?index=trueIn PDF document text
    • http://nunoxemimo.rf.gd/the_timeless_way_of_building_quotes.pdfIn PDF document text
    • http://junonuzutivo.epizy.com/56436634045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/519aff86-54ee-40c7-a601-3aa3edea2f1d/what_does_it_mean_when_a_girl_doesnt_reply.pdfIn PDF document text
    • http://peregal.epizy.com/15473834388.pdfIn PDF document text
    • http://pidezesu.rf.gd/fifoxuzowolalunofubaweza.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_a0ac420969b44e59b4c89d6a2169da0c.pdf?index=trueIn PDF document text
    • http://notumaxesi.epizy.com/42680692720.pdfIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_1875dc0e05e741c6aac1e4c5bdca4a3f.pdf?index=trueIn PDF document text
    • http://tewufadab.epizy.com/soxikisima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd555f2-5d2a-452a-b252-5bc52778d243/what_can_i_eat_on_the_21_day_daniel_fast.pdfIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_de8980cf95484b72a291447726839fe4.pdf?index=trueIn PDF document text
    • http://beximor.epizy.com/52312559652.pdfIn PDF document text
    • https://5e04165b-6ab1-49a6-9937-45006fc2fbeb.filesusr.com/ugd/d19879_bc26eb6205914ddba272fec719d7c1d1.pdf?index=trueIn PDF document text
    • http://tejusadesivuti.epizy.com/jupoditojideserugixakoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e0bb77-39e1-439f-bb9a-064bafa6965b/37384522273.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_off000119e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E9 5660 bytes
SHA-256: d21d8a2f7bb7c5151811f2194614d60edb59dad4df4a27d8f8e0b4967a67d54a
font_01_sfnt_off00012d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3A 10580 bytes
SHA-256: 46cac73a7f000bd33961588ed1d521325b6ceacac4351148c17f3afd1e537560