Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a286afdb8af477…

MALICIOUS

PDF

41.6 KB Created: 2020-08-07 20:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 980d5677e7d46d993ded2cfed4070704 SHA-1: 205976424ee759ba8b66045868c360c5faa96bb8 SHA-256: 52a286afdb8af4779356a0a7c4dfd97f6d559b283630e1e8b473c28810ae3787
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.com/pify?keyword=epidural+analgesia+in+labour+pdf In PDF document text
    • http://lawakut.asthecrowfliesquiltshop.com/uploads/1/3/1/0/131070146/6705401.pdfIn PDF document text
    • http://files.lose-weight--faster.com/uploads/1/3/2/6/132695576/megasurufaz.pdfIn PDF document text
    • http://tasizu.interdimensionalspiritualawareness.com/uploads/1/3/1/0/131070718/megutinasoxojum_maxewogapozifal_kotataruw.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/1/0428/5821/7631/files/72085855535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4636/2523/files/5428556901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16485275060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5121/9104/files/jogogizirebalano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/72689170090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6387/7537/files/75329292066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17418425376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/lurabigexosamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1878/7736/files/join_files_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8958/3514/files/nevapafepanazub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/zirewepinevano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/58684952866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/68374934931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/83363569488.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_off00006560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6560 5304 bytes
SHA-256: f10838acd4ddcd5dbd4d142f2ecc3ad7e03cec2fbe033b802afc8b522b42a8cc
font_01_sfnt_off00007772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7772 10040 bytes
SHA-256: 1e6046fb0378c48bdf2bba5c27cb12d1f74c0e326f44c6a26eccf689ce972168

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