Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22fcfc9c1542103…

MALICIOUS

PDF

53.1 KB Created: 2020-06-03 20:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 967df86a2dab6ba9d2890bcfaaaead48 SHA-1: 47407d1f293efa3768e67d456f224c2e42cd1954 SHA-256: c22fcfc9c1542103edc7e36bc92066d93da7f93480f71b3761678e9de8742624
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, with a dominant host being undeadcameras.com. The document body, though heavily obfuscated, contains a URL that matches one of the extracted external URIs. This suggests a link farm attack pattern designed to lure users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://conqueringlifeasawidow.com/uploads/1/3/1/6/131636935/131636935.html#computer+vision%253A+a+modern+approach PDF link annotation
    • http://undeadcameras.com/uploads/1/3/0/8/130813420/sekeburadopuj-zojonariz-gotanomibu.pdfIn PDF document text
    • http://wildernessfamilies.com/uploads/1/3/0/6/130621979/dimipajatadofidabo.pdfIn PDF document text
    • http://hostmaster.beautechnique.co.uk/uploads/1/3/0/4/130436258/0d2473c.pdfIn PDF document text
    • http://mail.hadlowpreschool.nz/uploads/1/3/0/7/130776808/mamolekunigupil.pdfIn PDF document text
    • http://myhappyheartspreschool.com/uploads/1/3/1/3/131383614/ginudi_lomoduba_fenutusibazosef_potoridanuga.pdfIn PDF document text
    • http://sojocounseling.com/uploads/1/3/0/4/130489075/3888210.pdfIn PDF document text
    • http://maxbrowntrombone.com/uploads/1/3/0/4/130435556/8275036.pdfIn PDF document text
    • http://conqueringlifeasawidow.com/uploads/1/3/1/6/131636935/terms.htmlIn PDF document text
    • http://conqueringlifeasawidow.com/uploads/1/3/1/6/131636935/dmca.htmlIn PDF document text
    • http://conqueringlifeasawidow.com/uploads/1/3/1/6/131636935/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pafaxaputar.files.wordpress.com/2020/05/95928613982.pdfIn PDF document text
    • https://zerutufos.files.wordpress.com/2020/06/names.pdfIn PDF document text
    • https://derexomej.files.wordpress.com/2020/06/45025323284.pdfIn PDF document text
    • https://pomigizob.files.wordpress.com/2020/05/91939412835.pdfIn PDF document text
    • http://cochlear.dss.ucdavis.edu/uploads/1/3/0/6/130639605/8729191.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA38C 10996 bytes
SHA-256: 54bcdc04e7c98823690e49ed2c8ccb6622071ad47f71faea045a2bb89d1a6f8d