Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7e99e21b11e33b…

MALICIOUS

PDF

64.8 KB Created: 2020-10-25 11:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 859b996b32400828511890af008112ee SHA-1: 4fae74d32d7b7ee981d9fe47af3ac732fcf96217 SHA-256: ab7e99e21b11e33b9d35b902f832e654a0b288b7a0114bc9f3ed552dd485cde4
202 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?keyword=pathophysiology+of+birth+asphyxia+pdf In PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/c7e5081bc6b95.pdfIn PDF document text
    • https://wezawitulenif.weebly.com/uploads/1/3/4/3/134338426/zilutofakoles.pdfIn PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/ed09db181.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/bovudefomuleb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406455/normal_5f926d6d1056f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f8838eb0d329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_5f8e76a10d18a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5f9522deda3b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5f90c7d35b5d3.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://s3.amazonaws.com/gupuso/93065187955.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/zakalefow.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/federal_bank_aptitude_test_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6518/6206/files/xunefodapikopofokuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2431/8115/files/stcw_convention_and_code_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3681/0152/files/supplier_university_of_polaris.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/ligavidobogulelulotig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86785902-2a42-4fff-a0b7-d3893cb39b8a/lekuloguxovipuzezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/519d5a27-212a-46e6-a97c-dce3e9f0c1e0/44846274190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/7771399448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5207/5681/files/53765312331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1983/5802/files/you_are_mine_urdu_novel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2931/8808/files/turtle_talk_with_crush.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_off0000ac00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC00 5180 bytes
SHA-256: ca1574a50abfe676d6cd8787a3f3c0eb0e569d492498b230f9969298ed3b8835
font_01_sfnt_off0000bdad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAD 12848 bytes
SHA-256: bd343bb946a4704a37eeae07f4fa5b7e2cd5f535274e5c95763712ef8ca11bdd
font_02_sfnt_off0000e6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361