Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd19ba7503d10ac…

MALICIOUS

PDF

89.7 KB Created: 2021-02-20 01:46:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 6ee1a23cad10a6d15396bb7f689efa49 SHA-1: 93d89ac9620e8dd8a4ccaa01b79bd7b53e0a1cd6 SHA-256: bbd19ba7503d10acad508e353d0a446aa09b6f3a6220c13e24a63ff92d3778c0
156 Risk Score

Malware Insights

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

The PDF file, disguised as a Delonghi manual, contains a significant number of external links, indicating a link farm or a method to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://jottigo.ru/strik?utm_term=delonghi+lattissima+touch+en550+manual PDF link annotation
    • https://zolerowiz.weebly.com/uploads/1/3/4/6/134691656/fivojemaki.pdfIn PDF document text
    • http://gufutaca5.xyz/gakiwulonotonipesodapudawom0p0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5fc7144b8b319.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428069/normal_5ffd3fc172335.pdfIn PDF document text
    • https://vovikadu.weebly.com/uploads/1/3/4/5/134587732/fowedo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486353/normal_6006177cc91e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488349/normal_5febe0ce22115.pdfIn PDF document text
    • http://naturfresh.space/41274180077boc0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381101/normal_6007c26270eaa.pdfIn PDF document text
    • http://dorightunion.com/bushnell_tour_v2_slope_manualsrkui.pdfIn PDF document text
    • http://spain50off.info/najixorewoeh0iz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463308/normal_602f43738fa6b.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/panalipolifod/dabuje.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/10665528287.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AE 5264 bytes
SHA-256: 9fdebcc74ce877e4c3c3f43bf327c7c2097b80924a7325ddf190e71ecb2e61bb
font_01_sfnt_off00010675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10675 15460 bytes
SHA-256: 476131bb7d89738a9cae538ced9ce4588621fdd6da85cba470cc1e7c31bed022
font_02_sfnt_off000135fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FB 16136 bytes
SHA-256: 699a4da165a1a53e535d15483008e79804057b83f017e60777d19007b45ee033
font_03_sfnt_off00014aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AED 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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