Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff1b60681fcfaf0a…

MALICIOUS

PDF

75.6 KB Created: 2020-11-14 10:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f80ca66075301dac0e2e273b6ae44111 SHA-1: d2871a1f010f14f314cae5003c5ed07e8bcd7084 SHA-256: ff1b60681fcfaf0ab3206b41831259250eabf43f3e0530aa1d66f214db3b7900
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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/aws?utm_term=camera+scanner+android PDF link annotation
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/4118662.pdfIn PDF document text
    • https://powizosiki.weebly.com/uploads/1/3/4/0/134041047/berev-vipaju-bepozezedal.pdfIn PDF document text
    • https://posodukur.weebly.com/uploads/1/3/4/3/134347560/9050252.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/8ad98d21.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/fosagoba/boy_skull_picture_cartoon.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/outdoor_air_conditioner_enclosure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c72111-a2b5-4889-85a9-2b3500fc0731/90675538863.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/74935934100.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/black__decker_lcs1020_battery_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/29723368537.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/forest_lakes_subdivision_memphis_tn.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/pure_cash_earn_money_free_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c735dd4-d85d-43d2-aba4-ad502423e050/wabokibuvalavu.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/breakfast_at_tiffany_s_book_free.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_off0000eba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 4956 bytes
SHA-256: b1d69ec3f169d8d07ce2458321df6b55331cab1254fa1012b4a25a979a7a3111
font_01_sfnt_off0000fc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5D 10988 bytes
SHA-256: e5101587696b04a4f1050f6c17c18a784b0d0e4e208c9a5f48917891a71a3ec5

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