Malicious PDF — malware analysis report

Static analysis result for SHA-256 af8fca3754b89873…

MALICIOUS

PDF

47.2 KB Created: 2020-10-25 21:01:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 5a19118a68416daad07adc3a8fa76f9d SHA-1: e14dd4dcd1db00c0593db86d7ab7b4e7d24dab1a SHA-256: af8fca3754b89873f44b9813f88530ca8addad39423e87ed70872885c7e864c2
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/aws?keyword=myers+briggs+personalities+pdf In PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/kulizozelibewelis.pdfIn PDF document text
    • https://xakexoxos.weebly.com/uploads/1/3/4/3/134307698/wavudidubop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f8a4245421c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383915/normal_5f94024684afd.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/jamokaroxoj/10062769519.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/autonics_photo_sensor.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/cae_mock_exam.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/calendario_2019_con_feriados_peru.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/boziduwuson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2780537f-6405-48f0-90f8-6c34953a000a/9305868816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8907c9a2-4c06-41b9-8768-60bc81814481/snare_drum_solo_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/097bb550-574e-4163-8239-34b312d8a861/57324683153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cf0fd25-c407-4142-ace9-52dad8e4591d/38233323009.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/tuxawogamupujuwiw.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/urine_catheter.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/centralismo_y_federalismo_en_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/206577b2-80e8-4e0e-b272-acf312e368d8/dadufenidopomev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb06b2cd-e2aa-42c8-b17c-c6ca7326d2a6/ncaware_sign_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5025501e-964a-4691-bb3c-25ef2d118a09/xepedajologavafefu.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_off000069f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F1 5244 bytes
SHA-256: 13224cbdf2c983a3a67adc2da6f44bc01e4288fc6c09f35554e8a511e0be11c6
font_01_sfnt_off00007bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD1 11112 bytes
SHA-256: 404f18382d14e809ba1f94a47855da50c4b5004742d7b24882a60d189905dd01
font_02_sfnt_off0000a1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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