Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b19463d278da436…

MALICIOUS

PDF

98.8 KB Created: 2021-03-14 00:37:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 13e3dcf1afe99c11361c508e75164f03 SHA-1: 5569865b5694cfa007a5e19c3cf0b7a165f45979 SHA-256: 2b19463d278da436e8e9f67368cb38dd360a30ddb4ad7f3a710321239480ef73
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains or link farms, indicating a likely attempt to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution through these links. No scripts were extracted, but the PDF structure itself is designed to host and present these numerous external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=letter+of+financial+support+for+visa+canada PDF link annotation
    • https://sevozinevuzejok.weebly.com/uploads/1/3/4/9/134903388/zesizi-wugikunonuxix-tojagedumorupop.pdfIn PDF document text
    • https://sanijala.weebly.com/uploads/1/3/4/8/134889677/510834.pdfIn PDF document text
    • https://kexinebig.weebly.com/uploads/1/3/4/3/134338338/veguwabakimigitegoz.pdfIn PDF document text
    • https://nasuzezigoma.weebly.com/uploads/1/3/4/5/134587751/kibonefoxupurava.pdfIn PDF document text
    • https://setowunujabid.weebly.com/uploads/1/3/4/0/134095848/6cc082feb5a51.pdfIn PDF document text
    • https://moduruwili.weebly.com/uploads/1/3/2/7/132710657/8019411.pdfIn PDF document text
    • https://mogatuzutixu.weebly.com/uploads/1/3/4/6/134684840/8123897.pdfIn PDF document text
    • https://woziwunamewig.weebly.com/uploads/1/3/1/6/131606321/galuzo_dozolimaviwabu_lefuw.pdfIn PDF document text
    • https://guxanavos.weebly.com/uploads/1/3/4/2/134235011/sipiwipet.pdfIn PDF document text
    • https://gosinixubog.weebly.com/uploads/1/3/4/8/134875818/37c5458.pdfIn PDF document text
    • https://lujukote.weebly.com/uploads/1/3/2/7/132712447/2112677.pdfIn PDF document text
    • https://kodopagedo.weebly.com/uploads/1/3/4/3/134350575/2370624.pdfIn PDF document text
    • https://namulore.weebly.com/uploads/1/3/4/0/134017746/df538.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/lizuseguwix/bagenulibiserejozode.pdfIn PDF document text
    • http://bideliv.rf.gd/hunter_gummistvler_strrelsesguide.pdfIn PDF document text
    • http://gitunuge.rf.gd/what_does_ninjutsu_mean_in_naruto.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/what_fruit_has_no_sugar_or_carbs.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/50921996502.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_off0001367a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1367A 5032 bytes
SHA-256: f8430d0cdc9ebbd60435586e562a4b0ea99f98f163566857ad9ee3e827a89e53
font_01_sfnt_off000147a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A9 11600 bytes
SHA-256: 1e7498433502e32a351736ebd31a772ac64ae036ef327fd0d39f134a28e16e5d
font_02_sfnt_off00016f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F4B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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