Malicious PDF — malware analysis report

Static analysis result for SHA-256 d363131f62d0863e…

MALICIOUS

PDF

110.3 KB Created: 2020-12-23 15:04:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b8c08e939875bbecf6d945ea599b3607 SHA-1: bb4cd6f2a82c7cd0c931a09f438ff05c599f13e4 SHA-256: d363131f62d0863e78ae9eef3782eede8369f101bf5d17095c1e97f8513af195
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains a significant number of embedded URLs, many of which are identified as redirectors to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the extensive link farm points to a campaign aiming to lure users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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://cctraff.ru/123?utm_term=4th+gen+4runner+manual+transmission+swap In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404740/normal_5fa32dc874fe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375341/normal_5f8edb343931a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5fab1959b4a90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411926/normal_5fd7953ac5a5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452853/normal_5fc80a4e3fd10.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/jiwegilelowumut_bepewo_sobegipovukobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5fd6593d5bac7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449172/normal_5fb78ba1bc7bb.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/kiguteperilodu/guide_post_inn_bradford.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b82bed-0ce0-4dbb-8ce4-ac76ab85dd56/cold_frame_plans_woodworking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8be9e8e-cc48-49cf-9830-00deb0564e53/funny_answer_the_phone_ringtone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8caf26ad-5715-4d2b-a322-8abde77220d2/82964678273.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/alfabetismo_visual.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
    • 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_off0000eb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB36 36056 bytes
SHA-256: 9b927a6080167aed8f8d338587133f9361a6a48c4b6e42bf7c042103e89567e4
font_01_sfnt_off000159be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159BE 5316 bytes
SHA-256: 50822f55ccb5cd9ddfc2cb61d1768a2534b3200757ea0334587a5157386ce926
font_02_sfnt_off00016bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BC1 13068 bytes
SHA-256: b00af88994e87e7a575f090abd1e19c5413f081fc3c9d957ffbe53dfed8f5c9d
font_03_sfnt_off0001971f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1971F 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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