Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba14914d687d1a1…

MALICIOUS

PDF

65.3 KB Created: 2021-05-22 04:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 68c19b09ab5f70ff75326b10a965fba7 SHA-1: 9bff1b21ffb336f8ea0dbd52984a9537954564a5 SHA-256: 7ba14914d687d1a179a9b2398f9213cbe33d47f3d62c25ec33ac5c2ad63c2e54
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://ponafet.ru/strik?utm_term=what+is+shadow+and+bone PDF link annotation
    • https://jefilixepiras.weebly.com/uploads/1/3/2/6/132681342/8faf85acc58f5c.pdfIn PDF document text
    • https://natatujefeni.weebly.com/uploads/1/3/1/6/131607075/ae13264e257.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/09548cdc-5292-4d4b-a0d3-b6df39f85521/craftsman_gt6000_lawn_mower_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/77162221057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc675608-c273-416e-a33d-65671ce0d2b6/53271302850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6905c73-2db8-4761-97c9-8d2fa5f993d6/ncert_english_grammar_for_class_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/801c70ce-91e2-4765-8794-b6ae257a44fd/71628809305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cac3453-503f-4aa1-bc44-c15069cddfa6/how_long_does_dr_browns_steriliser_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee510fa-38e4-4ad5-873e-e6ecbf8c07bc/vakebovoxeti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab7dec0-7bb8-47e3-9cc5-384c0f7d89ac/a_primer_in_positive_psychology_peterson.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/gupowunarogizas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a392f0e-f49f-442a-a3bd-9216555c3940/steal_this_book_first_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a78962-e6c1-481c-8c48-3ecc528eb40c/actividades_de_ortografia_para_tercer_grado_de_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/747079ad-67dd-4ddb-9ca1-6977451566e6/nekevapajisavofafobuvak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e4d5ac-2f7a-4fba-9553-c734d48de2fd/ruvinamifasiwilubozupi.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/boutonniere_deformity_finger.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/ios_beta_13_beta_5.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_off0000c560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC560 5032 bytes
SHA-256: 60ad71295a1f9dcb45db46a1ae53069f577ef1295b7c440a4252a910df8d3854
font_01_sfnt_off0000d690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD690 9844 bytes
SHA-256: 1625e5d0feeccb51334f6c6fa54ea0494153037f6dff3ac00abbbbfbd54cad58

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