Malicious PDF — malware analysis report

Static analysis result for SHA-256 0accbfa3b5e3010b…

MALICIOUS

PDF

84.7 KB Created: 2020-12-30 03:10:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2a445626e6ca440c56a0520b70ca1458 SHA-1: 9b57d239fe2594770fc6bf44970373b9b92d4e73 SHA-256: 0accbfa3b5e3010b1b3010aa5f229ca05b9c4165d7140ba8a17258e86e71e163
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF file is identified as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a social engineering attack pattern (ClickFix). The document body, though heavily obfuscated, contains text related to game downloads, likely a lure to encourage users to click the embedded malicious links. The file also contains a large number of links to external PDFs hosted on disposable domains, indicating a link farm or phishing operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • 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://cctraff.ru/strik?utm_term=bounce+ball+game+3d+nokia+5230+download In PDF document text
    • https://lunafegosewexik.weebly.com/uploads/1/3/5/3/135351611/1090619.pdfIn PDF document text
    • https://xuredetinumimo.weebly.com/uploads/1/3/4/6/134630251/4295416.pdfIn PDF document text
    • https://rakerekibakefe.weebly.com/uploads/1/3/4/5/134596095/2994913.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/g0Yjjp1/risk_probability_vs_impact_matrix.pdfIn PDF document text
    • https://rokumipizo.weebly.com/uploads/1/3/0/7/130776068/5822598.pdfIn PDF document text
    • https://xujuwoxevosu.weebly.com/uploads/1/3/4/8/134896670/1502543.pdfIn PDF document text
    • https://gagufivelorifig.weebly.com/uploads/1/3/4/5/134596616/7736325.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/2059d99b-6251-402d-993c-743ec06fb4a3/arduino_uno_r3_caracteristicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7f6aa50-f0b9-4472-9adb-7509ce3e2e73/21879026921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe7e90b4-2b62-43b4-afdd-b140c76d79b4/relic_skeleton_watch_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1a541b-a2b1-4946-b516-93675ba39b81/67508796011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/287b9780-edab-4760-bc74-7953f0bd71ba/509799554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc758eb-4766-46f0-874d-35b100a76afe/giwirinif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf64080-e9c6-48ad-a023-a555d985822f/find_my_friends_phone_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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 5892 bytes
SHA-256: 4d7cc9eca8526228a2ed9e73ec72a067919063657c8eec3aab4ea6958ed4e6a5
font_01_sfnt_off00010a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9F 10804 bytes
SHA-256: 1abd1e70b78d2a0487d8addd2f17d516da293185cec0f20f661641d5fa6b3cb5
font_02_sfnt_off00012ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF3 16144 bytes
SHA-256: f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d