Malicious PDF — malware analysis report

Static analysis result for SHA-256 c542ba637e829f5f…

MALICIOUS

PDF

53.1 KB Created: 2020-08-23 02:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9d69ff7fd7aac9708fd8e4e54f32e7f9 SHA-1: 235af87a8681c587f85b34a5c5fdf8575494a7f4 SHA-256: c542ba637e829f5f64939a43255bf0a5bea4a8abac9a1012c7c35b98fec6f8cc
194 Risk Score

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/pify?keyword=valkyrie+anatomia+mod+apk In PDF document text
    • http://fopuf.katahdinbelgians.com/uploads/1/3/0/8/130814328/pasuwipote_kigezemevudojur.pdfIn PDF document text
    • http://files.scorpionbikewheels.com/uploads/1/3/1/4/131407921/kugip_balibolided_lijijiwi_bexurogi.pdfIn PDF document text
    • http://files.iius.org.hk/uploads/1/3/1/6/131637570/xenuxej_baxalafev_konofagakuxojan_zofenijemanekef.pdfIn PDF document text
    • http://files.lanieroutdoors.com/uploads/1/3/1/4/131482823/6d606eb57846.pdfIn PDF document text
    • http://files.desigalli.com/uploads/1/3/1/8/131856725/getefufidux-xoxujafowe-subenipuk.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/1/0430/4456/9242/files/legrand_batibox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/90974780246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8271/1201/files/43577185210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/nixipopasemilazovesop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9492/4694/files/personal_mission_statement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/tata_aia_insurance_premium_receipt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4445/4056/files/92943166248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7482/9987/files/rakog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3472/1959/files/signal_and_systems_oppenheim_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/zigumavotaxowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9988/9569/files/nisulasezurudug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1760/0156/files/juwuv.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D2 2880 bytes
SHA-256: 619a44e8b5c2a2d3fc0e18259d8022938ad4f8b30552901bc68dc41c3d0f2ef0
font_01_sfnt_off00007310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7310 5060 bytes
SHA-256: 22b9b89ca5bea7f737a2f0f2675cc695d99ac96546b834d146a4cccb65f0ee83
font_02_sfnt_off00008430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8430 14700 bytes
SHA-256: 5db27e64c192a762bf121dc39315e8bef8ba21b29cc00dba5bc30165da0f7c2c
font_03_sfnt_off0000b1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A7 16220 bytes
SHA-256: dd3c5c6f61eeff27aff1f1e767ba53253f0bcf8225a5a268a4e5276f3ca0e26b

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