Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89fb846a9afbbbf…

MALICIOUS

PDF

78.1 KB Created: 2021-04-13 09:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 465682523e1e87c3622f71c556b34fd4 SHA-1: bd69d171246eb3064a04d57afc7534b48cbfae3e SHA-256: d89fb846a9afbbbf9f755958c2963de91f3ade7ebf250aa88bb99aeab06ba9ab
244 Risk Score

Malware Insights

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

This PDF document contains a large number of links designed to create a link farm, redirecting users to various external sites. One of the primary links leads to a known malicious redirector infrastructure. The document's content is a lure, using a seemingly innocuous topic to encourage clicks on these malicious links.

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://dafemum.ru/strik?utm_term=how+to+deal+with+a+child+with+adhd+and+behavior+problems In PDF document text
    • https://pebepatesova.weebly.com/uploads/1/3/4/4/134447190/6f7ef70d25055.pdfIn PDF document text
    • https://jitosagar.weebly.com/uploads/1/3/4/3/134318128/345380.pdfIn PDF document text
    • https://dalatomim.weebly.com/uploads/1/3/4/3/134344090/dexaf-ramofoji-tamagexexojopi.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/Uicx8g3/national_d_day_memorial_facebook.pdfIn PDF document text
    • http://xuvepawa.iblogger.org/jojeriwenopifopiziz.pdfIn PDF document text
    • https://mazanotofubemiz.weebly.com/uploads/1/3/2/6/132681192/5663801.pdfIn PDF document text
    • https://kowezuvive.weebly.com/uploads/1/3/4/6/134603832/773513.pdfIn PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/4219213.pdfIn PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/4024174.pdfIn PDF document text
    • https://pukukadusese.weebly.com/uploads/1/3/4/6/134666137/vetugizen-nodinugikag.pdfIn PDF document text
    • https://lanilemu.weebly.com/uploads/1/3/1/3/131381326/wiravitekikemeguwoti.pdfIn PDF document text
    • https://sitimewodojex.weebly.com/uploads/1/3/1/8/131856527/a9f49ff.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/bGggJ5T/elune_tier_list_gamevil.pdfIn PDF document text
    • https://cdn.sqhk.co/kavatupopum/jgZCfVk/megitenuretuzuxosor.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/pBgdzZe/39219176874.pdfIn PDF document text
    • https://delosixopefo.weebly.com/uploads/1/3/4/3/134344482/fumobigaromogi_kutopi.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/PhcLgdf/tricky_riddles_with_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wepaxilex.epizy.com/javututu.pdfIn PDF document text
    • http://gegawuwiru.epizy.com/99810554439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13e9aa13-978d-4410-bd1a-008fdc8989a0/past_simple_exercises_interactive_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee880e70-f379-4e56-bda6-3de15e81b7fc/flysky_ppm_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f3095c-4242-457e-a501-a64961b75332/tunetetunedag.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_off0000f49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49E 5568 bytes
SHA-256: b39ad33bed6380a028cc0b995d04d14718910ab13c052a27bb890eba8aba6949
font_01_sfnt_off0001076c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076C 10276 bytes
SHA-256: c40a4b245a173deec4b1f569b4d7f63edc0daad2a2aeadad5b4046a4f6d37bb6