Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1a1f53bdc9d34f…

MALICIOUS

PDF

66.1 KB Created: 2021-02-01 21:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 93f213806e54831950922490740b6344 SHA-1: 178da5795bb7c7c3a87dcadb190ee008831733c6 SHA-256: fb1a1f53bdc9d34fd669fbbe23eb3f4f2c739b2e0778c67b67438b635cb7780e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external websites, many of which are hosted on dynamic DNS services or appear to be part of a link farm, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' specifically flags the mass of external links. ClamAV and ML classifiers also identified this PDF as malicious, likely due to its deceptive content and malicious URL distribution.

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://bologen.ru/aws?utm_term=persuasive+writing+checklist+pdf PDF link annotation
    • https://wijirejilape.weebly.com/uploads/1/3/2/8/132816202/gekizegezakatotib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464067/normal_5fe97e3293382.pdfIn PDF document text
    • http://lojasamericanasbr.com/fugewexe79o21.pdfIn PDF document text
    • https://zedusolurifi.weebly.com/uploads/1/3/3/9/133999882/vesokewon.pdfIn PDF document text
    • https://fadefewili.weebly.com/uploads/1/3/4/3/134316521/bf75fa61e552.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407299/normal_5fdf4eda37793.pdfIn PDF document text
    • https://cdn.sqhk.co/mofipife/Gjjhh3k/35929352810.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370285/normal_5ff23ad72a662.pdfIn PDF document text
    • http://tiktokhd.design/wibanudemajoluwusagvjbdr.pdfIn PDF document text
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/cb453c.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/nitizobuv/bulawibowimipepa.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/zelaleludowomabanu.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/livro_de_neemias_hernandes_dias_lopes.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/photo_emulsion_sheets_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/66871200516.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_off0000c585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC585 5632 bytes
SHA-256: c7241db707da69a6321a35f0b7f1976f57d0666fcff3891aa6e60da0d835dd64
font_01_sfnt_off0000d8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C0 10228 bytes
SHA-256: 0eda280a9832fcc2276b4f940f00e6eb257082dd485b76bb56a2af1f1aea02df

Open this report in the interactive analyzer, or submit your own file for analysis.