Malicious PDF — malware analysis report

Static analysis result for SHA-256 548baee01659156f…

MALICIOUS

PDF

81.5 KB Created: 2021-03-29 10:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 86b96d8d95909ed9c7d3984521b0868c SHA-1: 81b0cae7c0c49a1f9b17928db9f17fdc3f075e0a SHA-256: 548baee01659156f55c9c8572c3cb9319a09da8c0ef2bd78287f9489b9331b35
176 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking PDFs, suggesting an SEO link farm or a phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URI firings point towards a malicious document designed to redirect users to potentially harmful content.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://golowaki.ru/award?keyword=cstr+bioreactor+pdf PDF link annotation
    • https://bapuporodotuxo.weebly.com/uploads/1/3/1/3/131381531/6604057.pdfIn PDF document text
    • https://todusoxi.weebly.com/uploads/1/3/3/9/133999566/bcf88a.pdfIn PDF document text
    • https://jorojesa.weebly.com/uploads/1/3/4/8/134861508/lirojetila.pdfIn PDF document text
    • https://zoseduzarososu.weebly.com/uploads/1/3/2/7/132740870/xidimemusukarige.pdfIn PDF document text
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/9994181.pdfIn PDF document text
    • http://lapugupofe.iblogger.org/let_s_dance_benny_goodman.pdfIn PDF document text
    • http://narovomesizi.medianewsonline.com/58325480974.pdfIn PDF document text
    • http://repovor.22web.org/44980391464.pdfIn PDF document text
    • https://vuxupiwiruxip.weebly.com/uploads/1/3/0/9/130969000/7684287.pdfIn PDF document text
    • https://lamobivuletopuk.weebly.com/uploads/1/3/4/8/134863798/07c3220.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/diwitapezu/sunbeam_electric_fireplace_heater_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/86810783174.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/fitexomotumu.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/hcv_genotype_4_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/36551088353.pdfIn PDF document text
    • http://vovakupalujum.onlinewebshop.net/hernia_diafragmatica_neonatal.pdfIn PDF document text
    • http://gupupofof.rf.gd/sowotuta.pdfIn PDF document text
    • http://xegaweripe.epizy.com/59888016040.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_off0000f308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF308 4960 bytes
SHA-256: 65ab7a87455b89ebd4ac3b478080e52808739d0272bc71577dfee7ec818ac982
font_01_sfnt_off000103ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EF 11348 bytes
SHA-256: 82ae99ea216a3c8c5dcae37e6fa68a7b730d86f3753db40b29268aa86ae0fc1a
font_02_sfnt_off00012aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.