Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c02aa037835150…

MALICIOUS

PDF

64.4 KB Created: 2021-01-18 14:10:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 778d09e95c06052b88650c25addc6b68 SHA-1: 7a1da0e0fad35149601045616e3793518350b7bc SHA-256: 03c02aa037835150f3525e836f64ac7ad8d98a2be5d74a72803b175f9d8b4f15
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents that may leverage embedded JavaScript for further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafffi.ru/123?utm_term=ryobi+staple+gun+p300 PDF link annotation
    • https://site-1177258.mozfiles.com/files/1177258/49270533404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f8b702a66cac.pdfIn PDF document text
    • https://site-1177563.mozfiles.com/files/1177563/davazaruxasakebomopotel.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/a6a7509.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366020/normal_5fe0c81fcfddb.pdfIn PDF document text
    • https://lojejibat.weebly.com/uploads/1/3/4/8/134861033/7079402.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443823/normal_5feff0d7136e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496378/normal_5feec4be54470.pdfIn PDF document text
    • http://zefabafiw.22web.org/basic_english_speaking_course_free.pdfIn PDF document text
    • https://melesosinipedo.weebly.com/uploads/1/3/4/4/134475371/sodewapope_gozosiriga_sinumajepir.pdfIn PDF document text
    • https://site-1201629.mozfiles.com/files/1201629/15816720733.pdfIn PDF document text
    • https://tonikajolokoge.weebly.com/uploads/1/3/0/8/130874266/dcf6afb7871b77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jasosuwer.epizy.com/delegation_board_template.pdfIn PDF document text
    • http://vudexejuvejutek.rf.gd/a_lei_bastiat.pdfIn PDF document text
    • http://zoxokukazo.epizy.com/beersmith_3_apk_free.pdfIn PDF document text
    • http://deketinak.rf.gd/automatic_call_recorder_android_9.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE0 5444 bytes
SHA-256: 0d1e6e5788676dd1760de3a8c26733e96234b9f394a7488e8eafb31e024f4ac8
font_01_sfnt_off0000d289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD289 10084 bytes
SHA-256: c9f346ec39a4a64803e252f293e5537c5b552485bab0256ab004f07bf55577a7

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