Malicious PDF — malware analysis report

Static analysis result for SHA-256 916736a894519eb8…

MALICIOUS

PDF

39.8 KB Created: 2020-11-07 10:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: b9510afea7000a3a0d72fb7a47d9b1bf SHA-1: cfdafa0f1102077c4c1bd377e43807faebbfe3b1 SHA-256: 916736a894519eb8ed78d97a6f3d54c5c75b05c2ef9eaa08e6b308317e7b60a9
136 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified as a link farm and an SEO redirector. The primary lure appears to be related to 'evolution review worksheet', directing users to a URL that likely hosts malicious content or phishing pages. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful websites, aligning with phishing or scam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/aws?keyword=evolution+review+worksheet PDF link annotation
    • https://komamopiragi.weebly.com/uploads/1/3/4/4/134444029/54e0a4b574.pdfIn PDF document text
    • https://kifugezob.weebly.com/uploads/1/3/4/5/134529667/1274652.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xuwomosax.files.wordpress.com/2020/11/naruto_shippuden_opening_7_full_mp3_download.pdfIn PDF document text
    • https://xusupej.files.wordpress.com/2020/11/fluke_power_analyzer_manual.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/reremuradivuvevedivogobid.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/tegidozurenozanolev.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/space_jam_nic_salt_flavors.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/decreasing_file_size_online.pdfIn PDF document text
    • https://gezovuxa.files.wordpress.com/2020/11/5950436523.pdfIn PDF document text
    • https://likuzow.files.wordpress.com/2020/11/40264502684.pdfIn PDF document text
    • https://s3.amazonaws.com/kalufizefem/66396688068.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/gastritis_aguda_erosiva.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_off00005fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD3 4736 bytes
SHA-256: e4f2a1d7d145caaa1c10094597d0a349c1181ece1d23d0d043b00e24f3c4bba3
font_01_sfnt_off00007000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7000 10004 bytes
SHA-256: 9658d930c72ff33aae0599157f7d5e453101b4f90e22941714b44fe32ac8fa58

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