Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d72ceb937d0fb1…

MALICIOUS

PDF

48.5 KB Created: 2020-08-28 03:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 58034dee2bec1f69a7f7d7f851d04983 SHA-1: dd1ceae2109b6ee91d6e33b6b749dc4c08695720 SHA-256: d4d72ceb937d0fb1a757f1b436651b59be2e6cf45728efa98380d86ee4b8bead
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service that is known to host malicious content. The document body mentions 'Denzel curry planet shrooms download', suggesting a lure for potentially pirated or malicious content. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

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.link/pify?keyword=denzel+curry+planet+shrooms+download In PDF document text
    • http://files.monbaptistassociation.com/uploads/1/3/0/8/130813054/pelovosokolo.pdfIn PDF document text
    • http://fojokivij.clarendonoutpost.com/uploads/1/3/1/3/131384771/jopisunebebu.pdfIn PDF document text
    • http://files.rumbleandresist.net/uploads/1/3/1/6/131606366/bbe34462.pdfIn PDF document text
    • http://files.cottontailcottage.org/uploads/1/3/2/6/132682684/bd037915f2df22d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9020/5090/files/54308699414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/xururipexutosakez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3594/1274/files/fijejajezexewasojeretu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/9875/3448/files/19978872501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zozaweguxilamefawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3646/7623/files/wurobufixesad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9759/4786/files/36767546716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5327/6574/files/majisimaxemudobumefafelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/mumotemulebuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5841/3216/files/jopenavigugexamig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0259/2410/files/17224582436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/60799226822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/dilbert_principle_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/vesejubimul.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBB 5556 bytes
SHA-256: 6a300d8c798174b0cff9daf36c3586a25e3b147ad1fd14e3e93c8f171d680165
font_01_sfnt_off00006e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E95 15216 bytes
SHA-256: d5ff34f23d34a7a6185b7d6db4f4ecd9eabb8c6438f9a920fb3c82bc93f8259f
font_02_sfnt_off00009db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB4 16060 bytes
SHA-256: 10572f3a10760712fbb8352e098d229fd21f48763f52fb6fd9385479015ceb58