Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb80d1bd22be139a…

MALICIOUS

PDF

77.5 KB Created: 2021-03-23 10:34:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c97ce3df244bd4d929b2d1013d9f5bfb SHA-1: 5d84663c582cc9640dd2a0625638d03bf877ff4c SHA-256: eb80d1bd22be139aae9cd558d48fc9b0496484f420802b8f3ad819254e62b9a9
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to IKEA instructions. The numerous embedded URLs point to a link farm hosted on disposable domains, indicating a likely phishing or SEO poisoning campaign. No scripts were extracted from this sample, but the presence of malicious links and the ML classifier's high confidence score strongly suggest an intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9611

Heuristics 5

  • 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.
  • 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=ikea+ps+cabinet+instructions+pdf In PDF document text
    • https://cdn.sqhk.co/pofoxubo/vThclkh/jemuporavakenugi.pdfIn PDF document text
    • http://allroadkamchatka.ru/kayla_itsines_workout_plan39zli.pdfIn PDF document text
    • http://nerroba.info/27045575323knb9n.pdfIn PDF document text
    • https://kudaxemukuwofi.weebly.com/uploads/1/3/4/6/134691428/rofafimo-sububomogalok-zabeso.pdfIn PDF document text
    • http://biomaniks.website/998374017013qohs.pdfIn PDF document text
    • http://mstmail.space/number_tracker_app_freeimtwh.pdfIn PDF document text
    • https://waxogisuges.weebly.com/uploads/1/3/0/7/130776632/842dfaea71ca1.pdfIn PDF document text
    • https://gewuvakir.weebly.com/uploads/1/3/4/6/134660990/975db3b1cf0f2.pdfIn PDF document text
    • https://vogovolakufa.weebly.com/uploads/1/3/4/8/134874318/sarugado.pdfIn PDF document text
    • http://watogoda.mypressonline.com/70997935146.pdfIn PDF document text
    • http://hook-up.fun/govinda_namalu_telugu_mp3_song_downloadtp0lu.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/rijoxalalu-miwejap.pdfIn PDF document text
    • https://debozolajaxagaf.weebly.com/uploads/1/3/1/0/131070846/5a8b16f8cc4c6.pdfIn PDF document text
    • https://puzileto.weebly.com/uploads/1/3/4/6/134674509/6015946.pdfIn PDF document text
    • http://kizunawinim.getenjoyment.net/z_for_zachariah_film_cast.pdfIn PDF document text
    • http://hydrofthol.space/31697714041d1iyg.pdfIn PDF document text
    • http://pycnidwzxc.info/rujipipadinoridoju7mte.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/ranco_fridge_thermostat_adjustment.pdfIn PDF document text
    • https://jumolixebeze.weebly.com/uploads/1/3/4/3/134352805/4a64c0dc7200d20.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/hcwW4mX/71276536330.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuvuzevo.atwebpages.com/ados_test.pdfIn 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_off0000ffca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCA 5256 bytes
SHA-256: aa2565398affdb0bb0b04ec0ef095ab31f219aefbfab4ae8fd21b8041205c4d5
font_01_sfnt_off000111b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B8 10928 bytes
SHA-256: 5ca020fac9c5b17795b4eda0cdcf0a75577c4940516ca48f639ab96555303f52

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