Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4bdc360a0209ffd…

MALICIOUS

PDF

82.3 KB Created: 2021-06-10 06:26:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a2ff5159ae48f4dbb460b3698dc8017e SHA-1: 3ce64251661ce5b55195ff9e5b10bad4cafdcb2a SHA-256: d4bdc360a0209ffdd58335fbeb44117a32ff196d96e77f300b5f8a691089fe3f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The primary URL, 'https://pistant.ru/pbw?utm_term=download+rtx+shaders+for+minecraft+pe', indicates a lure related to Minecraft shaders. While no scripts were explicitly extracted, the PDF structure and heuristic firings like 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pistant.ru/pbw?utm_term=download+rtx+shaders+for+minecraft+pe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417824/normal_6066006aa98ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_601b26caef00c.pdfIn PDF document text
    • https://xanugobolenaz.weebly.com/uploads/1/3/4/3/134371028/1764174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488133/normal_5fe62f92875fe.pdfIn PDF document text
    • https://loponulofaxoli.weebly.com/uploads/1/3/4/3/134324484/4759172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485942/normal_604116b2ac999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451544/normal_604b5631c643f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388156/normal_604e24906b8cd.pdfIn PDF document text
    • https://bemawavopul.weebly.com/uploads/1/3/4/6/134692962/1851640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379984/normal_6037d60a21094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419424/normal_60bc47650dd81.pdfIn PDF document text
    • https://mipoxijal.weebly.com/uploads/1/3/4/7/134709746/1062264.pdfIn PDF document text
    • https://lokurosafo.weebly.com/uploads/1/3/4/4/134479987/vefej-tamerubatij-vezil-zovemelewi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xereledo.pbworks.com/f/29620886733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2c53f01-dbc1-476b-91c9-b479429890ff/zikosudaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a725b1-649f-4ff7-a362-7db0f4a7e7a4/epson_wp-4020_ink.pdfIn PDF document text
    • http://midevodimu.pbworks.com/f/troy_bilt_horse_blades_wont_engage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ee8323-b9dd-417a-80f6-2a4ab2d1d7d7/tibel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d69e882-ada6-4285-b8bf-945c3c1c27e4/99839448027.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/f/nupono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b534871-225f-4106-84cf-04e8b9c0b80d/hard_math_word_problems_for_adults.pdfIn PDF document text
    • http://zusemivak.pbworks.com/w/file/fetch/144538863/guitar_tab_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f62bca5-5783-438f-aa7e-eca0da23e3fc/garmin_gpsmap_1222_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5fc2058-e2ee-4cd8-bf39-150af57950e7/7253243782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec1a300-7f48-4441-806d-083d2a47e37f/wivudodoteputovelisovoni.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE528 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off0000f60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60F 5344 bytes
SHA-256: 1d90a4d6b9a00c40256943b22875370ea353c4d52be6b963ff237193bceec007
font_02_sfnt_off0001081f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081F 10784 bytes
SHA-256: 883ae446fa8b706bf6ff896a7eb5890744d0294047606ed4e62ae85e8fc18eb0
font_03_sfnt_off00012d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D01 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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