Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32e84f74f514e2b…

MALICIOUS

PDF

66.0 KB Created: 2020-11-14 19:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f1fcfd132406ae5b258201671770378e SHA-1: e680b6ed1da13f425159d294f9f98e2888282e0a SHA-256: d32e84f74f514e2b2872f8b19d28a72edb69a3d2188032bca0aa62926a051d75
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a 'calculating paycheck worksheet'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URL suggest a phishing or redirection attempt, likely leveraging a PDF exploit or social engineering to lead the user to the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/aws?utm_term=calculating+paycheck+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_5f95f387e292e.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/nesubine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388040/normal_5f924b29b6ff3.pdfIn PDF document text
    • https://pewixuzapama.weebly.com/uploads/1/3/4/6/134655392/jodavufulo.pdfIn PDF document text
    • https://puwevifu.weebly.com/uploads/1/3/4/4/134465284/3740883.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/lovetijif/multivariable_calculus_solutions_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/chalo_amarnath_chalo_amarnath_bhai_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/956b1bd8-d353-454d-bc06-b431be554d97/mumor.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/xidodugorisufopumitofuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d412911c-8630-4dbb-bc8e-d0e05cac5279/89681649962.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/14655900687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32c925d2-e622-4187-a4f2-b4e1a688898f/42678446930.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/mofidazizalebulogo.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_off0000b752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB752 5360 bytes
SHA-256: 151feca936db859c457de23b00600187585a1876a048b14209022eb9bead4307
font_01_sfnt_off0000c99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99D 10356 bytes
SHA-256: ac59c7c714021eee45897a4169fc6b0d432aa37fa2c6b3bdd93af81953532754
font_02_sfnt_off0000ece5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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