Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f378553a310b707…

MALICIOUS

PDF

65.1 KB Created: 2020-12-23 15:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5d93b93819a491b8fe2080302fa502e1 SHA-1: 67f1b7d7a8cc8bcd7df37a19841164611529317f SHA-256: 1f378553a310b7072fbe4c85042783f95180888b359a4569ec595d3d393360a7
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'cctraff.ru'. Additionally, it exhibits a PDF link farm heuristic, indicating it hosts numerous external PDF links, with 'bonesinidojesu.weebly.com' being the first identified. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan. While no scripts were extracted, the embedded URLs and link farm behavior suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wb?keyword=mecha%20tank%20arena In PDF document text
    • https://bonesinidojesu.weebly.com/uploads/1/3/4/5/134591006/ca244349ce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377717/normal_5fbd4d9baba7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416504/normal_5f996eb1961cd.pdfIn PDF document text
    • https://cdn.sqhk.co/pekebugus/jaozghy/odia_bharat_lila_hd_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f8deeafaef95.pdfIn PDF document text
    • https://cdn.sqhk.co/jasorevujoxu/DCUjhhc/banglarbhumi._gov._in_land_information.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374685/normal_5f96c4b3a4854.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ebd88f7-a1da-4bf9-a4a9-95c0a82d5c5f/gubuzazimebotetun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0347718-7cf2-48ef-acd2-0f4701997ec1/8803582209.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/41315808800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b412eb-24bd-4d00-8328-2a02d1d6c5e6/anger_of_stick_4_mod_apk_revdl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/982f6f4e-3a16-44ca-be99-f69e336942ea/droidbox_apk_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc648ff-97bc-481d-9550-90ec0a465c69/pokemon_tower_defense_3_download.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 2

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aeba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEBA 4744 bytes
SHA-256: 17e9a6912733a5d1d6cdb645ac8853723d1f4ac0cfe41d295ed9b9c347bbee77
font_01_sfnt_off0000bee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE4 10856 bytes
SHA-256: edd91ba53339d53937d1ececa9fc0fe769983d775ea06be27f9a19bc017d0f53
font_02_sfnt_off0000e307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE307 16096 bytes
SHA-256: 26604b5f834ffc967c026058f2afd0626b90b8a56ceb326faf49e137264e1426

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