Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c6a57d6992f5cc…

MALICIOUS

PDF

133.8 KB Created: 2021-03-16 11:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4d524ab4c10afafffc8babaa63167b8e SHA-1: 15042e042d4523c93419c9b00ffd34af6c989102 SHA-256: 62c6a57d6992f5cc4cf13ccf15639c6c481926b8d29272f83ca5f43ba52987a1
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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.
  • 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://druttle.ru/123?utm_term=jio+caller+tune+application PDF link annotation
    • https://cdn.sqhk.co/wakewafo/atnjagd/vivaldi_browser_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/Bziadii/certificado_medico_escolar_sep_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/jbjiTmD/new_country_music_christmas_albums.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445866/normal_60013d71a67fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468553/normal_6030692589383.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369158/normal_5fec976c8875f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448332/normal_60340db5dead3.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/hAUWgfJ/89167271731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393889/normal_601c9a50e8a14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4526930/normal_603c2e509d751.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/mojivikapeti/bifujogiwagiradebetanavip.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/21310195812.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/milodizuwovufat.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/java_tutorialspoint_offline.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_9e90efc49f5d4f43baf36c14da60f1d2.pdf?index=trueIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_18c8e4eaac1c48da89b4cb5af59e9a66.pdf?index=trueIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A31F 4736 bytes
SHA-256: d2571c8ee6af7d5fb5f602509c7d49252eb66f2d165c51dcfd75391f69b6d8ce
font_01_sfnt_off0001b346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B346 7164 bytes
SHA-256: 6cedf118fffd24f5d2aec4b3e2e75a151aa88ee4884df1df82fc689b7b3eb76d
font_02_sfnt_off0001ca1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA1F 13052 bytes
SHA-256: c4dae65d1ad5198a983a90fc1576180aa6ad1295daddd36ece144efd0ccb86f6
font_03_sfnt_off0001f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F52F 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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