Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc16bbc1c0305cd…

MALICIOUS

PDF

45.8 KB Created: 2020-10-04 21:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 49f29c71c45828dc37b32f1395fdcbb9 SHA-1: a89da54bb5a57d508afe63232bacdef6cb606b04 SHA-256: adc16bbc1c0305cdff6359dcf084e582469c089e63160b5817def16801caa921
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://gettraff.ru/pify?keyword=plate+tectonics+review+worksheet+answer+key In PDF document text
    • https://site-1039280.mozfiles.com/files/1039280/vikoxewutixejupemul.pdfIn PDF document text
    • https://site-1037215.mozfiles.com/files/1037215/tadinagobeb.pdfIn PDF document text
    • https://site-1039698.mozfiles.com/files/1039698/sapavetoziguzujawibudoxep.pdfIn PDF document text
    • https://site-1039188.mozfiles.com/files/1039188/sabusonobosuwobawezagevux.pdfIn PDF document text
    • https://site-1038421.mozfiles.com/files/1038421/kubixuguxa.pdfIn PDF document text
    • https://site-1038909.mozfiles.com/files/1038909/gamazinevupagew.pdfIn PDF document text
    • http://bumiw.meekernz.net/uploads/1/3/0/7/130776213/wajakovu.pdfIn PDF document text
    • http://tivorab.promisedministries.com/uploads/1/3/0/7/130739654/tasagesulon_jafunenawebimer_kesimudazevipat_fiwadukop.pdfIn PDF document text
    • http://files.holapostpartum.com/uploads/1/3/2/7/132712129/4975702.pdfIn PDF document text
    • http://files.baselimmunology.com/uploads/1/3/2/3/132302926/e6b05b270e.pdfIn PDF document text
    • http://files.sialoffice.com/uploads/1/3/1/0/131070894/2812237.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/1/0432/5598/8374/files/mjoll_the_lioness_house.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/sezapovaradakivodov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0119/4907/files/home_depot_store_credit_balance_checker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/9670/1845/files/lincoln_park_golf_course_scorecard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4877/8400/files/karazhan_nightbane_guide.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_off00007551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7551 5208 bytes
SHA-256: f00ddc6b6efcb26a9ead0acd78cac79cf3080e735864af8b6eca322f0328bd43
font_01_sfnt_off0000871a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x871A 10144 bytes
SHA-256: 1d5219c1d1911582ed3b2c2a42505be796451c7f85bc41bc1cfaa2cc6a1868cd

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