Malicious PDF — malware analysis report

Static analysis result for SHA-256 802acc6a845a53ce…

MALICIOUS

PDF

54.1 KB Created: 2020-04-12 21:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 8603c5457df910f628798bc46656f065 SHA-1: 64d22fa9438df3cf012ac582b874d563414b73f5 SHA-256: 802acc6a845a53ce7f170b0eba7342ae3ccc97945ccf5f9be907b86e2875eb98
96 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier and contains a large number of external links, characteristic of a link farm or SEO spam campaign. The embedded document body text, though partially corrupted, contains a URL that points to a potentially malicious HTML page. The presence of numerous PDF files hosted on various domains suggests a coordinated effort to distribute content or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 http://fuegolatinogastropub.net/uploads/1/3/0/6/130621713/130621713.html#el+pasado+participio+de+carry+en+ingles+ejemplos PDF link annotation
    • http://corpimmigration.com/uploads/1/3/0/5/130545684/gisemezewipalerigas.pdfIn PDF document text
    • http://auroratreeservicepros.com/uploads/1/3/0/7/130740550/5796281.pdfIn PDF document text
    • http://partnersbuildinggroupllc.com/uploads/1/3/0/9/130969801/3200320.pdfIn PDF document text
    • http://kurthindustries.com/uploads/1/3/0/6/130620769/2834494.pdfIn PDF document text
    • http://numeracyshed.com/uploads/1/3/0/5/130590019/fidar_rufuzoxazumiza_gefaxovafikal_viguveduzad.pdfIn PDF document text
    • http://asiaticsports.com/uploads/1/3/0/5/130538988/07b8740.pdfIn PDF document text
    • http://ruraltx.org/uploads/1/3/0/4/130483286/3821756.pdfIn PDF document text
    • http://certainlysharp.com/uploads/1/3/1/4/131438304/5862532.pdfIn PDF document text
    • http://vacavillenails.com/uploads/1/3/0/7/130739970/wefuwoduwoxazi_kalejaluxilezo_bifojerobepemi_gefijufaxo.pdfIn PDF document text
    • http://namyangitaly.com/uploads/1/3/0/4/130479389/4427739.pdfIn PDF document text
    • http://rajatmedia.com/uploads/1/3/1/4/131454492/2662837.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: adamsoldit.com 6 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000926a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x926A 9080 bytes
SHA-256: dbf26a52c9aa42e9fe949bf0bbb726b64896868a25576c60fbca7421ce292eda
font_01_sfnt_off0000b37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB37F 16416 bytes
SHA-256: a165db233a17ecd5b75d607947f61dfeffa9306d5297ff8339e29f7feb2b25ad