Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb26497181b377f…

MALICIOUS

PDF

77.0 KB Created: 2021-03-10 18:12:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: bf6f86554e3b7f74906501131dcf3c4d SHA-1: ff3162a1b900954a3b71612c80bed299dfcd6431 SHA-256: 0eb26497181b377f20b5a3e36faf419e7e04136409a98f2ff684b58fdfab51ba
244 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, many pointing to disposable hosting or redirector infrastructure, suggesting a link farm designed to distribute malicious content or phish users. The document body, though heavily obfuscated, contains text related to a 'practice ged test 2021', which serves as a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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=practice+ged+test+2021 In PDF document text
    • http://tebapewulodafe.getenjoyment.net/33203373332.pdfIn PDF document text
    • https://jufoxaju.weebly.com/uploads/1/3/4/4/134489692/jabapusix.pdfIn PDF document text
    • https://gudivolopuna.weebly.com/uploads/1/3/5/3/135346868/7986075.pdfIn PDF document text
    • http://bekowakiged.iblogger.org/garatexobowam.pdfIn PDF document text
    • http://nesobaka9.xyz/how_many_watts_is_my_sunbeam_microwave0kahg.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/kagip.pdfIn PDF document text
    • https://filinisosiwox.weebly.com/uploads/1/3/0/8/130814007/kojusabunemar.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/vidilusire.pdfIn PDF document text
    • https://ralunudedosamot.weebly.com/uploads/1/3/4/8/134856058/5ce33247a1fd2ab.pdfIn PDF document text
    • http://kubojep.iblogger.org/9465363284.pdfIn PDF document text
    • https://totiboliz.weebly.com/uploads/1/3/4/8/134897880/7366078.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/89698558427.pdfIn PDF document text
    • https://loworukad.weebly.com/uploads/1/3/5/3/135312099/8155555.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/avital_remote_start_user_manual.pdfIn PDF document text
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/galagiwari.pdfIn PDF document text
    • http://itdomen.fun/duradidoguxizolazrer.pdfIn PDF document text
    • https://kiledakod.weebly.com/uploads/1/3/5/3/135385809/4118609.pdfIn PDF document text
    • http://fazurusitu.getenjoyment.net/joy_luck_club_a_pair_of_tickets_summary.pdfIn PDF document text
    • https://dikubudekoguzo.weebly.com/uploads/1/3/1/8/131857294/tovepuvito.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gonedufugeferat.rf.gd/81851333745.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/pokanomukafufina.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/87646397100.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/basic_simple_present_tense_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/toregusidufanizo.pdfIn PDF document text
    • http://dazigeles.rf.gd/59070576423.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/tissot_t_touch_solar_set_time.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_off0000f053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF053 5400 bytes
SHA-256: bc790bd35b9125d8027435c09ca8638b0becb06255bce0da0d870681dc90ee04
font_01_sfnt_off000102be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BE 10464 bytes
SHA-256: e96d5d36995bf4b27be72d499923e43d570c0118f226de794728f429f6259c24

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