Malicious PDF — malware analysis report

Static analysis result for SHA-256 b958e0e0c8279330…

MALICIOUS

PDF

54.8 KB Created: 2020-07-12 15:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: adb402b0fd5c56672a14b538593a2f93 SHA-1: 3f78e91b9148d55856823e40369b85061d365dff SHA-256: b958e0e0c82793304a316b5656ba1c48a97e8e398ac8e18cb2baec6ba8773335
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains and are flagged as malicious redirectors. The document body, though partially corrupted, includes a URL that appears to be a lure for 'history of ecumenism pdf'. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or redirection attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.cc/wb?keyword=history%20of%20ecumenism%20pdf In PDF document text
    • http://files.louisacasas.com/uploads/1/3/0/7/130738531/0eb560b16938e.pdfIn PDF document text
    • http://files.brandonmoorecomposition.com/uploads/1/3/1/4/131438766/muxigem.pdfIn PDF document text
    • http://files.dewynns.com/uploads/1/3/2/6/132682565/wibatidekox-vadibafazoro-wepoxoxigojuz.pdfIn PDF document text
    • http://files.healingwisdom5.com/uploads/1/3/1/3/131383791/dekil.pdfIn PDF document text
    • http://files.dnaleatherwa.com/uploads/1/3/0/7/130738814/8327209.pdfIn PDF document text
    • http://files.cassandradenhartog.com/uploads/1/3/0/7/130738806/9e07b.pdfIn PDF document text
    • http://files.sunnylifemedia.com/uploads/1/3/1/8/131871786/b4120ee4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dinipexus.files.wordpress.com/2020/06/33195031518.pdfIn PDF document text
    • https://meziwam.files.wordpress.com/2020/06/xojorovogerapubenimo.pdfIn PDF document text
    • https://sufunitazot.files.wordpress.com/2020/06/jetibipado.pdfIn PDF document text
    • https://kavowuv.files.wordpress.com/2020/07/tifoluwirata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nepel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/dewuwodufiwasadopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/redoforavilobuvemajuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/nupesosus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0848/2710/files/bupowukokujabud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/8913043926.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A69 5004 bytes
SHA-256: 0d3236299608ee2a9a05560361db1618f4da26a0c38a3f44dae2155831a02ee6
font_01_sfnt_off0000ab55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB55 10288 bytes
SHA-256: 295abe37656225bfca58f43e9ec95c53c3021c84048bc282159a10724ae3e5e2

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