Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67019714eb10f89…

MALICIOUS

PDF

74.6 KB Created: 2021-05-20 02:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 92c4dc0b2e8c2aca4c7f20ebb10e8089 SHA-1: da3064636fc6126a6e1539823047040d6fd766ff SHA-256: f67019714eb10f891daf4e2ae5b28b41eafa8d6f6955c821d444262ff6c3f6d0
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 0.9997

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://botokaw.ru/strik?utm_term=common+myers+briggs+personality+types PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445866/normal_6058b99cb2f81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528876/normal_5ff5457d58521.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491933/normal_6065496e6173c.pdfIn PDF document text
    • https://supagerafigi.weebly.com/uploads/1/3/0/8/130874211/e9d7831c28.pdfIn PDF document text
    • https://detaxotipag.weebly.com/uploads/1/3/4/7/134730838/ae8d55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461505/normal_605a1552c07e6.pdfIn PDF document text
    • https://zegilaritapedu.weebly.com/uploads/1/3/1/4/131438092/31cf41a0f80b08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/satudifin/9538756354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63d5c5e-39b8-467d-8bd0-6933744a783b/89251106678.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/plural_forms_of_compound_nouns_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41507886-e2aa-40f9-a373-42710ae5b280/vurigabazikuwegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0d0e82-841f-49b7-a999-3f441b6a64c0/kewupigikiwoj.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/caring_for_a_newborn.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/89799236779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eafefafc-181a-4838-9931-ca2702291244/68155767776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b0d7cc6-b5be-4044-b45f-f42551e066e6/pride_and_prejudice_1940_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42924c6e-f984-4d13-9793-be75751fdc60/92988154242.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/72986967256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aca15ed5-4522-4f54-85d1-8edb39ec3634/nexokid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ee14552-d781-4b64-a607-9382e96a31ae/the_art_of_raising_a_puppy_chapters.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F8 5288 bytes
SHA-256: 8b68061a94b47b118e83fed0e396fafe074f455b3115b64189ce5c5287000ca4
font_01_sfnt_off0000fbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDF 9788 bytes
SHA-256: 4d73576bf76ea6eafe2beaef85abb988c937ef77ea8297cf58a4123e886116a4

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