Malicious PDF — malware analysis report

Static analysis result for SHA-256 b200d74082595842…

MALICIOUS

PDF

84.4 KB Created: 2021-04-02 11:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 406913ecdb8b834266ef07cf10e13d1b SHA-1: 924d72c75abebe5868f7c865bdb7f7711247dbaa SHA-256: b200d740825958426b61f9fa67e5b7e1044184437bb4d5938190d563c145fd82
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful sites. ClamAV detection and ML classification strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and extensive URL usage are indicative of a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://xajibur.ru/123?utm_term=bitdefender+box+2+user+manual PDF link annotation
    • http://petersikdar.com/tiduposabokizagufogefkz.pdfIn PDF document text
    • https://zesalogerevuj.weebly.com/uploads/1/3/4/6/134684883/8189196.pdfIn PDF document text
    • http://lbaranaydin.com/650003968806ajbf.pdfIn PDF document text
    • https://bixolajulepu.weebly.com/uploads/1/3/4/7/134746591/diwun.pdfIn PDF document text
    • http://fashion-deals.xyz/twas_the_night_before_christmas_words_youtubear93c.pdfIn PDF document text
    • http://suvekitubexeso.getenjoyment.net/nursing_aptitude_test_with_answer.pdfIn PDF document text
    • http://epipog.com/505781773169zukq.pdfIn PDF document text
    • https://bevugatumuga.weebly.com/uploads/1/3/4/3/134316863/mudidimobomo-nedokojeveg-mavoxidogurij-xejujevinin.pdfIn PDF document text
    • http://paselon.getenjoyment.net/wigolamafixivimabemesi.pdfIn PDF document text
    • https://xupulepil.weebly.com/uploads/1/3/4/3/134322414/semomotuzonol.pdfIn PDF document text
    • https://zafatuxowusetex.weebly.com/uploads/1/3/0/7/130739053/48f293b921eb.pdfIn PDF document text
    • http://tibudirowe.mygamesonline.org/ahmedabad_full_map.pdfIn PDF document text
    • http://rivafigikiwax.medianewsonline.com/sulajigogawob.pdfIn PDF document text
    • https://pejeronasoko.weebly.com/uploads/1/3/2/6/132682646/9711355.pdfIn PDF document text
    • https://xibuzapesajeg.weebly.com/uploads/1/3/4/2/134236274/fevavilevil.pdfIn PDF document text
    • http://mavaxur.mywebcommunity.org/pdf_akuntansi_keuangan_kelas_11_semester_1.pdfIn PDF document text
    • https://dalatomim.weebly.com/uploads/1/3/4/3/134344090/09ccc42849.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/zoreve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/dotudabubowunuligaja.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

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_off00010ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA1 5444 bytes
SHA-256: c26077af42c911300148b886294d8e021c02cdbadcd4700ffc4f1ed658f6dbcf
font_01_sfnt_off00011f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F11 10912 bytes
SHA-256: bbc043922ba9734be747dfa433f2bfdbdacd645e62a6288c0420dbe89d8cfef3

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