Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac1e0e3aebd1419…

MALICIOUS

PDF

65.6 KB Created: 2021-01-09 18:36:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9b2f1ff00e92a2a5f84aeff30e291956 SHA-1: 853254f12504679f62b89a3d0befdb0df8610587 SHA-256: 9ac1e0e3aebd14197994faf3d84d1b1ff9a479723e7b145db914196c2def2467
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, including a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Acura rdx android auto update'. The presence of multiple PDF links and a malicious redirector indicates a phishing or scam attempt designed to lead users to potentially harmful content. No scripts were extracted, but the heuristic firings strongly suggest malicious intent.

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
  • 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.
  • 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/aws?utm_term=acura+rdx+android+auto+update In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_5fd7c1bf8c7bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410695/normal_5fc8297951912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f9a0c4875770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f8b40179ee5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492586/normal_5fc63c80bfbb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f8c53a4a6aa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445726/normal_5fc945bc0d73f.pdfIn PDF document text
    • https://nunofisodopuw.weebly.com/uploads/1/3/4/2/134234763/1514838.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366024/normal_5ff5640729c1a.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://s3.amazonaws.com/wejuvono/faxawowezori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/432200a7-d320-4777-a29d-3cc3670e1566/82527587994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/217ddcb8-3342-4c59-8171-01cfa164a27e/17163968313.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_off0000b762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB762 4796 bytes
SHA-256: ea47c62b0c0d9ddf0e6d25bd28cbcdfce2a9d203194dfbe49563b4d3157258ae
font_01_sfnt_off0000c7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B9 10420 bytes
SHA-256: ec483948c96a5bc0701c6721c0ef9a6fee42f49129609839db12f10fd82fc1ef
font_02_sfnt_off0000eb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4B 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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