Malicious PDF — malware analysis report

Static analysis result for SHA-256 688c06f7dd3e0d88…

MALICIOUS

PDF

66.3 KB Created: 2020-11-10 10:18:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 73ea9f66aa1bf4aa04b11018e4d02c4a SHA-1: ba02d7e1f382b66da04c4de7209eea7d8757194c SHA-256: 688c06f7dd3e0d882aacb5d11d28b4de77c96d38657d936965289b215f5c3c6a
252 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to disposable hosting, and one critical link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains keywords related to a 'Sonic dash mod apk pc' download, suggesting a lure for potentially unwanted software or malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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
  • 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?keyword=sonic+dash+mod+apk+pc In PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/jesozitufas_bareradikakap_zopan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f87085c1ff44.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/698c7f200.pdfIn PDF document text
    • https://bugukafu.weebly.com/uploads/1/3/4/4/134490359/cc95e40c93.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/losimavuteza_fobuzalejaken_guvijanadude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418180/normal_5f980a5f20b52.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/zezegeje.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/1c5e5a73-7f6e-4cac-b97a-f02880d07373/pandora_app_download_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/puvalakon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc646bbe-0bc1-49c7-bd45-b3cf424eb2d7/parallel_space_opiniones.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_off0000c36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC36C 5352 bytes
SHA-256: 07e4a6c2abd724ef5f9375c3844caff4b4a5f0d9da5dfa5d2c83f7609eb6cfb2
font_01_sfnt_off0000d57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57E 11164 bytes
SHA-256: 737fc376f1b2a28a9be06f5b5f35e735eceaad8cfb333d54d167bc670fef0503

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