Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b83cfb76e0753e2…

MALICIOUS

PDF

69.0 KB Created: 2020-12-22 01:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b852ecfa50a96c5c44c409275a05d299 SHA-1: d5e6ce1a650ede22b491526f63f76466dce125ad SHA-256: 8b83cfb76e0753e20b5a2945ed6874688b1c065b29091a099388ac143fc08e07
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://ggtraff.ru/123?utm_term=little+grass+valley+reservoir+fishing In PDF document text
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/6274e72c6c2.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
    • https://uploads.strikinglycdn.com/files/4f80e00c-1efb-46fe-bf25-a28931174e2c/13992335127.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/cbse_guide_class_7_sst.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/82306483518.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/roblox_electric_state_darkrp_hack_script.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc319ba3dfdd95b60e373eb/t/5fd1cf5ea9eaf43bd85589a9/1607585630339/wings_etc_menu_prices.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe12027a185d20763ec87a9/t/5fe12664faa166011667a4f4/1608590948917/talano.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/5379894545.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12254405d5340f32af944/t/5fc5ce12e6d49a06bb5c899a/1606798868541/1518638404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d5fba55-c625-47f7-bd00-4f57bb0a3e3b/43381353680.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/67162210956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc9a111-71c3-4bc8-a8c2-04d9a6502e09/home_depot_wallingford.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/9992687967.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC294 4920 bytes
SHA-256: 184f4a5b3f1f1b6aa35dd10021ec27a4a84b743ee081b617c6716c14e03faeb6
font_01_sfnt_off0000d352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD352 10884 bytes
SHA-256: 05e1d0023b812d12d45b99339a8d95c5910bd838ab97b566a723a104eb2528a1
font_02_sfnt_off0000f87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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