Malicious PDF — malware analysis report

Static analysis result for SHA-256 93cdb9b2529c48cc…

MALICIOUS

PDF

87.1 KB Created: 2021-03-20 05:07:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 021a0e8773610234c8ecea9cacebf69e SHA-1: eb08afceca8901df2e2eea9c0434da3132529e93 SHA-256: 93cdb9b2529c48cc9fe39cf644b179d9a0c3bc5721c908137d7aed2e6815c23c
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, and it contains a large number of external links, many hosted on disposable domains. The document body, though heavily obfuscated, appears to be a lure related to connecting wireless earbuds, likely to trick users into clicking the embedded links. The presence of numerous external links suggests a link farm or redirection scheme designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pelibifir.ru/strik?utm_term=how+to+connect+hype+true+wireless+earbuds PDF link annotation
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/fumexobubotu.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/f2486.pdfIn PDF document text
    • https://jabenawonidibe.weebly.com/uploads/1/3/5/3/135385032/melikajozeras.pdfIn PDF document text
    • https://welirupew.weebly.com/uploads/1/3/4/6/134662060/eb2b00729d2b154.pdfIn PDF document text
    • http://xorudaz.iblogger.org/sutuja.pdfIn PDF document text
    • http://fesigemujelepir.66ghz.com/html_email_signature_template_mac_mail.pdfIn PDF document text
    • http://rovolimobu.iblogger.org/dudubulojip.pdfIn PDF document text
    • http://sonuwazuregup.22web.org/amazing_grace_piano_arrangement_free.pdfIn PDF document text
    • https://kefawefixak.weebly.com/uploads/1/3/0/7/130738991/9426464.pdfIn PDF document text
    • http://zivufomureko.22web.org/pirazu.pdfIn PDF document text
    • http://pogolaf.iblogger.org/fel_la_la_land_actors_names.pdfIn PDF document text
    • http://sirosin.iblogger.org/cervical_spine_radiculopathy_exercises.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://089130c0-62ae-4bf1-a93c-656440fe8451.filesusr.com/ugd/738632_45d2abedbe12490589dc824a7227efae.pdf?index=trueIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_5d72764ddb25450292bb48222bc5fc62.pdf?index=trueIn PDF document text
    • http://pejulok.epizy.com/one_minute_cure_audiobook.pdfIn PDF document text
    • http://zuxekesimulir.epizy.com/26956603199.pdfIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_eb87750ec1204d53a90cb62676389fd6.pdf?index=trueIn PDF document text
    • http://kakapefetabol.rf.gd/truss_analysis_method_of_joints_examples.pdfIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_049ab251dcc5454e8101daa7803df21a.pdf?index=trueIn PDF document text
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_cf3a4efe78164895ab1fc33ca90972fb.pdf?index=trueIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_2505e3f7e9f34ca0bad13a60da8c9d01.pdf?index=trueIn PDF document text
    • http://tenurusimuxu.epizy.com/seated_overhead_press_form.pdfIn PDF document text
    • http://ruxabuzavejar.epizy.com/zidilikaxu.pdfIn PDF document text
    • http://kugezukakig.rf.gd/zepibevakefobewutegofo.pdfIn PDF document text
    • http://fuvituze.epizy.com/abc_me_app_apk.pdfIn PDF document text
    • http://vipiwimepi.epizy.com/gilalotofokisujenet.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_off00011006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11006 5456 bytes
SHA-256: 288e8b5048c6df7e831ce6a88dc838e39fc85bb76fdd20df974a2c44d499feee
font_01_sfnt_off0001229d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229D 12452 bytes
SHA-256: 3512a1d752dbf0fdaf717c11785a29dbd56f3648f040adb6fcd388de5737faad