Malicious PDF — malware analysis report

Static analysis result for SHA-256 54419618bdf71aa9…

MALICIOUS

PDF

74.8 KB Created: 2021-02-22 14:03:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4beaedb2f87d9221da68b9c3b0d0efff SHA-1: b118542cef5177cafa28fb34ed08df925caef838 SHA-256: 54419618bdf71aa9acffbf0bcf64072636129404821ef96008eaf778ddf919c9
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 pointing to disposable domains and link farms, indicating a phishing or scam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://baarspo.ru/wix?keyword=polar+bear+worksheets PDF link annotation
    • https://pofifeluvoka.weebly.com/uploads/1/3/0/7/130739131/vazalifapebikof.pdfIn PDF document text
    • http://ebay-coupon.ru/lagu_atreyu_house_of_goldqzopj.pdfIn PDF document text
    • http://universityru.fun/geog_2_textbook_answersnpjqv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371800/normal_5ffb96773a745.pdfIn PDF document text
    • http://instofficial.online/subupodinapibobawidwl33b.pdfIn PDF document text
    • http://playmarket-online.com/el_abc_de_las_instalaciones2z1sc.pdfIn PDF document text
    • https://tumokisomagen.weebly.com/uploads/1/3/4/8/134897409/gijuxulibiweronaxuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466135/normal_5fdb2eb38c61b.pdfIn PDF document text
    • http://ibkreactiva2020.com/aramaic_peshitta0etsv.pdfIn PDF document text
    • https://vokuduvalabi.weebly.com/uploads/1/3/4/5/134502282/07c85dc74f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369146/normal_5ffa7b9ce0c6a.pdfIn PDF document text
    • http://sallehub.xyz/gewopavubawuriq5s4n.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/how_to_get_10k_followers_on_instagram_2019ywkub.pdfIn PDF document text
    • https://pasobirumolok.weebly.com/uploads/1/3/5/3/135394389/3898690.pdfIn PDF document text
    • https://jajadonafusava.weebly.com/uploads/1/3/4/0/134040597/7a3b2.pdfIn PDF document text
    • http://am-sound.ru/21810559331ompkq.pdfIn PDF document text
    • http://shmelev.pro/girafojefazq5f7k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465919/normal_601920f3f39a6.pdfIn PDF document text
    • https://getawupib.weebly.com/uploads/1/3/1/8/131856556/pejum.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CE 5072 bytes
SHA-256: 9d924fb97abf9e9490799ef3dc6dc304fe583ccea3d8feb9b11a813572d0afa2
font_01_sfnt_off0000fb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB15 10424 bytes
SHA-256: 3f28a952194b194e2023376c3c0bd56b27ca0f0b0896a4adb36ef035b3c2f693

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