Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf47ab1717fda35…

MALICIOUS

PDF

92.8 KB Created: 2020-11-22 22:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 84a336409d5cce15a51665fb15eb7914 SHA-1: 926a91c82af2a4889da2aca61aee6eb95255a67a SHA-256: 8bf47ab1717fda359363ebc0157ca49495d78fb35c5d44240dd0a5f138f41b83
292 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or scam campaign, indicated by the presence of a link farm and redirection to known malicious infrastructure. The document body, though heavily obfuscated, contains elements suggesting a lure related to 'New York state little league district 7'. The critical heuristic firings for malicious redirectors and link farms, along with ClamAV detection, strongly support this assessment. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/123?utm_term=new+york+state+little+league+district+7 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392444/normal_5fa4100053103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374203/normal_5f9079334ca08.pdfIn PDF document text
    • https://dujizozobalosu.weebly.com/uploads/1/3/4/4/134470010/e5b305ff.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/simasuwosiwus.pdfIn PDF document text
    • https://puzemebakojufem.weebly.com/uploads/1/3/4/2/134234574/ad5fa0270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5f897b418b2a4.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/mimuwev.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/komaviv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382429/normal_5f9f69d3bbbc8.pdfIn PDF document text
    • https://wafulerafi.weebly.com/uploads/1/3/4/5/134503758/bipotadekereru-godiwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_5f8cb268b0fcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413126/normal_5f95f28918d21.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/muludofeza_xosuvawe_zawikep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484812/normal_5fafe861f0186.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/c1825d7.pdfIn PDF document text
    • https://kemipopebu.weebly.com/uploads/1/3/4/5/134585234/juvowodubavup_samuloxololu_natetetoxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00012d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D25 5412 bytes
SHA-256: 2454e20191dcc9f88c81a74786da661c49a8a87dea66a22262d5eed863a22f77
font_01_sfnt_off00013fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC7 11224 bytes
SHA-256: 3bf032a25bc2f232d6cae1ca6626e14670fc1961a1ac8d6b8584f8c5931a4ffc