Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee88e5e99529943…

MALICIOUS

PDF

66.2 KB Created: 2021-03-14 16:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d388db3f3d2b1d8557c3063236240693 SHA-1: 9c6598e71d1d24b35eca33ae2c4522bf032ee370 SHA-256: dee88e5e995299434f8f5fc1c15a398f44b910921fe38855d6321ea389ba1496
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=park+bench+autocad+block+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424682/normal_5fc944a4a0517.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/guberoxujujubuduvopatubok.pdfIn PDF document text
    • http://russianpatentexpert.com/norcold_model_n611rt_recallgogjy.pdfIn PDF document text
    • https://nefikeroliv.weebly.com/uploads/1/3/1/4/131453179/bofexepufa-kapakexadaraw-pubozegujonofid.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/ganoderma_lucidum_diabetes.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/webster_third_new_international_dictionary_online_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491946/normal_6020b979dc24b.pdfIn PDF document text
    • http://savadaqwe.space/92307074294t0z6l.pdfIn PDF document text
    • https://sixoribena.weebly.com/uploads/1/3/4/8/134848884/sexetorujubo.pdfIn PDF document text
    • http://reabook.online/instructors_manual_to_accompany_fundamental_methods_of_mathematical_economicszmnxq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408853/normal_60214f9ccdb0c.pdfIn PDF document text
    • https://rapovadok.weebly.com/uploads/1/3/4/7/134705404/848b64645607c.pdfIn PDF document text
    • http://graatorama.space/functional_fitness_exercises_for_seniors070bo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bofake/wezavekov.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/nowirovazebir.pdfIn PDF document text
    • http://kikanelomer.onlinewebshop.net/jepufujikifurunodek.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/52549234534.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/3529141594.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D6 5136 bytes
SHA-256: dfb772c6d73f089c8f70efc64c0fecd366d4530e43b522480695298af9d0f553
font_01_sfnt_off0000d949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD949 10096 bytes
SHA-256: 4855e96f445998169c412bcf2cbdef5c1e6e7432f8992bff976d19878e704abc

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