Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb8a4c1724cbe7f…

MALICIOUS

PDF

52.4 KB Created: 2020-10-28 16:23:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 954008d615b9725e7bb8dd6399683cbb SHA-1: d5f3ab899a409563fd6f2486db498333149aeee3 SHA-256: adb8a4c1724cbe7f900da16e31848236a75ac19308c1152450e7dbc981cbb996
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.me/123?keyword=37mm+flare+launcher In PDF document text
    • https://kogatakuzomaw.weebly.com/uploads/1/3/4/4/134444425/xazewokaxe.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/c1825d7.pdfIn PDF document text
    • https://wibiwiterudek.weebly.com/uploads/1/3/4/3/134373050/e23621e01e331.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/5484608.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3945e534-4ac3-4f16-bb3d-be722acfcb99/neverwinter_rogue_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/1333/8822/files/32473463071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2957/3031/files/muvona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/700ff3ff-09c4-4b33-9e3c-42b76211d131/ridapofas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/23504836841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5144/9504/files/bubble_witch_2_saga_cracked_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/xposed_framework_for_android_9.0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/enerlites_het01-c_programmable_timer_switch_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/91578017429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9625/1810/files/widute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3154/1952/files/polateze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7612/2779/files/mapujef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0160/8854/files/aapko_kya_pasand_h_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/hot_air_oven_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5642/1278/files/xifisepawopixesekoruxaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9279/3757/files/64676466014.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8057 4736 bytes
SHA-256: 934d6ffdb22192b13e763cdcb6eb18dffb3f2a5396c52dd565f3761cfda94019
font_01_sfnt_off0000902d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x902D 11204 bytes
SHA-256: 36f9a8c6dd12fe2c00e42ee68f907cefcf668c3cb96ac435a440fe8a767b1aaf
font_02_sfnt_off0000b6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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