Malicious PDF — malware analysis report

Static analysis result for SHA-256 06df151193f43823…

MALICIOUS

PDF

71.4 KB Created: 2021-02-02 14:03:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: aa57d8031a2e1065d43c892f7721d34b SHA-1: 17854789adeb6869361ea6e719f0eddc212bb54b SHA-256: 06df151193f438235662792e31d9eb895ba72a469d366d4bda7be82b0ca551d6
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/aws?utm_term=crunchy+cheetos+nutrition+information PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408172/normal_6015b61a1e9b6.pdfIn PDF document text
    • https://fukoroxovelamos.weebly.com/uploads/1/3/0/7/130776486/fozewowuvop_virorov.pdfIn PDF document text
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/2122799.pdfIn PDF document text
    • https://losulojer.weebly.com/uploads/1/3/0/7/130739206/351cc79a84655.pdfIn PDF document text
    • https://sutukedepebovi.weebly.com/uploads/1/3/4/7/134753024/9c395b9.pdfIn PDF document text
    • https://likunemotiro.weebly.com/uploads/1/3/5/2/135299998/bubasofebero.pdfIn PDF document text
    • https://wopirizebopate.weebly.com/uploads/1/3/1/4/131452778/tizomig.pdfIn PDF document text
    • https://finiluxib.weebly.com/uploads/1/3/5/3/135350298/baguwoz.pdfIn PDF document text
    • http://zobebukore.22web.org/sodoxuwuronetejiwoji.pdfIn PDF document text
    • https://nusutaligufobam.weebly.com/uploads/1/3/5/3/135393176/fdaaaee3e6baaa.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/suzujewa/isotopes_worksheet_pogil.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/out_out_robert_frost_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/0._8_mm_decking_sheet_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/48957540946.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/92585743323.pdfIn PDF document text
    • http://vomalowo.epizy.com/25660261746.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/bioscope_prime_app.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/c_c_e_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/pojabiwowisifuzobugoxakom.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/35773950626.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_off0000d9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CA 5096 bytes
SHA-256: b1380f6941c18f99c077e67d2175aa08ccf1248cc0788d98943dd8938de52ca2
font_01_sfnt_off0000eafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFA 11068 bytes
SHA-256: 18dd55341a817ec71632ef94a1b8dbf24c4c89bbce81964ebb4012a690a4e92a