Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75f815030d305a1…

MALICIOUS

PDF

79.1 KB Created: 2021-03-29 00:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d6f46b687412825331769f2d92735ddc SHA-1: b236ab4eaf170a27121f65ec646ddefa9f95097e SHA-256: e75f815030d305a1c84dc7b9bf7ef53a0d971a1d809597056007f4263c43c840
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam campaigns. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://dafemum.ru/aws?utm_term=what+is+indicator+species+science+definition In PDF document text
    • https://nomabedipami.weebly.com/uploads/1/3/1/4/131437379/wapedalepumiwu_zumakopomoru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494435/normal_603d197be82b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484359/normal_5ffaa47f0de3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479678/normal_605d4178a11bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454051/normal_5fe52dbc2694f.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/38785402232.pdfIn PDF document text
    • https://fotewusobowo.weebly.com/uploads/1/3/5/3/135339642/2dbb2c1.pdfIn PDF document text
    • https://tuwebuliwarukor.weebly.com/uploads/1/3/5/4/135400964/lebajovar_vakitife.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426966/normal_5fffd7eadbc4d.pdfIn PDF document text
    • http://zusagukitu.mywebcommunity.org/vehicle_bill_of_sale_nj.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/pevarijidasalop/9385709081.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/92252508654.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/manual_de_camioneta_honda_crv_2010.pdfIn PDF document text
    • http://vapelokalun.epizy.com/72575359454.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/damenelamegor.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/aa_morning_meditation_prayer.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/13432907896.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/adani_electricity_duplicate_bill_without_login.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/biriwimuzugesigozapozujux.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/68746606984.pdfIn PDF document text
    • http://zerodawoti.rf.gd/4541085736.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_off0000f94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94B 5224 bytes
SHA-256: 4997ade65967f08d0144e12e9c65a6edd851b1e3dbbea65ba586751415e9fe37
font_01_sfnt_off00010b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B17 10436 bytes
SHA-256: 2a9672f8533c29c01742c3630daf399dcfc5161db5d033094330fd96c7ea3bb6

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