Malicious PDF — malware analysis report

Static analysis result for SHA-256 561679b2bc43c828…

MALICIOUS

PDF

78.7 KB Created: 2021-01-05 05:59:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: df92a30a917a93f6e63b2b11dc6f9c5a SHA-1: 181df55a60328c62b715abce54489e7e1004b5db SHA-256: 561679b2bc43c8286e5b4a541eb1f151079ebc390f0885784f1f9a101df54f55
176 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. It uses a QR-code lure. 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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://traffine.ru/aws?utm_term=remove+breakpoints+in+android+studio PDF link annotation
    • https://cdn.sqhk.co/jekurona/Eyhivgf/wafuder.pdfIn PDF document text
    • https://bepugodaz.weebly.com/uploads/1/3/4/2/134236138/tunode.pdfIn PDF document text
    • https://cdn.sqhk.co/velizovatim/lsijgcd/sky_rolling_ball_unblocked.pdfIn PDF document text
    • https://nujujuzizupefe.weebly.com/uploads/1/3/1/6/131606206/nudexixiwowawa_mesasifu_lizut.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/2bf33b85-d543-49ba-a048-29b74da5cb3b/jadenenofiralutifimeliza.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/networks_guided_reading_activity_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/sample_letter_to_a_judge_for_child_custody.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/slavery_in_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/cauchemar_descended_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c587fd5e-765b-4e61-9b4b-adbb281ec7db/clownfish_voice_changer_not_working_on_discord.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/about_me_teacher_template.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/6913424964.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_off0000f55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55B 5344 bytes
SHA-256: 5a865c0bf593e9e8cdcd97491bb36f6ef107734f35a8f19e9010d8aba3302c45
font_01_sfnt_off00010775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10775 11244 bytes
SHA-256: 721dcf359a22eab0865bcf446977110f425ed967510435d2d891bcfd551289a0

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