Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3a7deacf2f7f69…

MALICIOUS

PDF

68.0 KB Created: 2020-12-24 09:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6863c14b9a262cad882260ce98b23eb1 SHA-1: e78d0652f4873ac1f8291c0e560856605c9707f8 SHA-256: 5a3a7deacf2f7f696843a411ce3d11855607e8ae2f30bf419baf09a4336abb21
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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
  • 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://traffking.ru/123?utm_term=fortnite+mod+apk+unlimited+everything PDF link annotation
    • https://cdn.sqhk.co/zijikunu/hcIFjgY/30339672148.pdfIn PDF document text
    • https://cdn.sqhk.co/bumigorawi/7jehdMv/blossom_blast_saga_mod_apk_unlimited_boosters.pdfIn PDF document text
    • https://cdn.sqhk.co/xakatikakizi/jfjeaPZ/street_dunk_mod_apk.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/bopop_ligetogukup_xizumatatapeno.pdfIn PDF document text
    • https://jumolixebeze.weebly.com/uploads/1/3/4/3/134352805/giwelopex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f8d621dbc6fe.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/jMjb8ia/retro_arcade_game_console_with_1399.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/85173455-91d0-463d-884f-9fdfdd0e7d75/sajunivuxafex.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/95232807654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8c5f62-db32-4e97-9a80-bcb2a9ce32d7/44900848347.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/31749075142.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/79623629321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d42d0e-22fe-4db0-be27-24d41d48465e/dasoguvifov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16b8349-3c34-45bd-895e-ae77c28b3ef9/xomegiviwivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b60f15cc-a1f1-4b51-923e-cf6516f0960b/jijuzipuwu.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_off0000cdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC2 5376 bytes
SHA-256: 4b51325722a5cffc3c38378d9d12f22fcb1c531c1c9340cf33aae083cc9cef16
font_01_sfnt_off0000dff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF2 10388 bytes
SHA-256: 4e82d90656f0254f63c3b8f1e7eda1dd5319ed232ae3b90336dced2d84e2bcae

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