Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30a0ab39b3e8482…

MALICIOUS

PDF

73.3 KB Created: 2021-02-21 12:18:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b5edfb5b69e80c39e89e3cf7ac9bb0a1 SHA-1: 829c89902d39b14d80010d9439d975926423d8bd SHA-256: c30a0ab39b3e8482c99473e980bc48c4c30ae94c799f7aa7acafab873c9bf821
194 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 hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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
  • 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://leonvi.ru/123?utm_term=how+to+make+persuasive+speech+outline PDF link annotation
    • http://newberginvestmentproperty.com/corrugated_tin_sheets_northern_ireland82jjy.pdfIn PDF document text
    • https://pedasivu.weebly.com/uploads/1/3/5/3/135387907/4605508.pdfIn PDF document text
    • https://pajuxosam.weebly.com/uploads/1/3/0/9/130968950/ridadijifalizoge.pdfIn PDF document text
    • https://dexigator.weebly.com/uploads/1/3/6/0/136049715/bifokevibab-xuwada-xugok.pdfIn PDF document text
    • http://watertea.space/40255505311qu2o0.pdfIn PDF document text
    • http://premiumpornclips.com/72369861909tt4rs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411498/normal_600ba8af93102.pdfIn PDF document text
    • https://zuzesewijolane.weebly.com/uploads/1/3/1/4/131406438/5f406a.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/124216801563yzvm.pdfIn PDF document text
    • http://itwow.info/nurego5z7l2.pdfIn PDF document text
    • https://muwikoli.weebly.com/uploads/1/3/2/7/132740525/vutojo.pdfIn PDF document text
    • https://gunajogozezulom.weebly.com/uploads/1/3/5/3/135385825/bofezesupokakowulu.pdfIn PDF document text
    • http://jsexj.fun/tarjetas_para_amor_y_amistad_manualidades344i3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384316/normal_60265d4012368.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466173/normal_5ffbbc93bd341.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/magulujomujarate.pdfIn PDF document text
    • http://storeeuro.info/english_dictionary_oxford_free7q43i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_603153aeb61b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/mi_android_one_upcoming_phones.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_off0000e04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04F 5348 bytes
SHA-256: 4c51d279c7e9f75fac44736638e73d72d063b73416063ac54454ce5e11a5f2f1
font_01_sfnt_off0000f264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF264 10944 bytes
SHA-256: e60ac47240ed4e48f4f73cc3b414e712c1ae7b4966a8b20e6c201b0c7fe76e8d

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