Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa2de3d4e33e0e1…

MALICIOUS

PDF

92.4 KB Created: 2020-11-28 06:27:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d399c732370b889cd4487995e26eae1f SHA-1: 90abace3f64f49e7453e0173a98fafc0d9015e16 SHA-256: cfa2de3d4e33e0e1778cbfdad8e09f340e545756eeb766826f00e3e414e91a28
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://trafffi.ru/strik?utm_term=skyrim+quest+order+guide PDF link annotation
    • https://nanufuso.weebly.com/uploads/1/3/4/4/134443711/tosinujo_kixisi_midififomewiw.pdfIn PDF document text
    • https://kukotefuses.weebly.com/uploads/1/3/1/6/131637352/5539061.pdfIn PDF document text
    • https://gudemulu.weebly.com/uploads/1/3/4/3/134387893/tobumame.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/e0d2e020-9593-40ff-993d-45826a1dfaed/variance_vs_standard_deviation_statistics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37c993e0-1f87-4a5d-be7f-f55bab378b3f/fable_3_all_dlc.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/narrative_text.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/siwokelojunibejilazu.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/xanawowafar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f88eac44-3be1-48b7-8fb6-33a03e9d04f1/molarity_practice_problems_worksheet_answer_key_with_work.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/bavitapifojeruxojenujiguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e69ec72-7ea6-4dae-b265-6d40ccd5b7f6/58544927258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b0ffdc4-807e-4ca7-a8b7-1b0f317cc2dc/caracteristicas_raa_tudanca_cantabr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8beca7c2-89d8-46ab-96f7-7e5029acc87c/pokemon_blazed_glazed_walkthrough_jo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f634bbc-e165-4202-8ee1-e46ff6216cb4/42640032246.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C2 5300 bytes
SHA-256: 6b1f8fd7faf88224be03a51ff461c6e1115b53227b5c30f5020dd7f7f8d69a06
font_01_sfnt_off000132b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B2 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00013e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E15 11548 bytes
SHA-256: 219c2f34264d50aa402da9f74928a26e2bce87ff64ecedd875be8dd6a8504cea

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