Malicious PDF — malware analysis report

Static analysis result for SHA-256 562cf1950f175773…

MALICIOUS

PDF

59.5 KB Created: 2020-11-08 08:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 25a7aece9a3dd7e68be965270eac9996 SHA-1: 1cb7a6177bf07ade191a42a6b09aaf326877cb77 SHA-256: 562cf1950f175773d9abf08fafba2a7f8a0a94d147ffcc17e587a4752016f273
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://traffmen.ru/123?keyword=onkyo+tx+sr604+owners+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_5fa3f1cbd2a4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416304/normal_5f9a10af5a584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f8a09a98575d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fddb3ce3-df84-4ff6-8ad1-b3eb12b4fba4/wivopilanaxofedibotudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c6b805-9575-4aa6-bcaa-199f0f1da278/pusowavafo.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/mudotovaxikox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b267b05-e712-405a-bb8f-c8a1b443ec93/guparajolevulafadurerib.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/how_to_train_a_pitbull_not_to_bite.pdfIn PDF document text
    • https://tafelataxuka.files.wordpress.com/2020/11/ligalumabisepinidin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e2af4ef-ccff-40d1-88c7-60d330dd1052/vavifisosivonejabulaxum.pdfIn PDF document text
    • https://ragejaso.files.wordpress.com/2020/11/advanced_mechanics_of_materials_and_applied_elasticity_solutions_manual_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/kamen_rider_build_cosplay.pdfIn PDF document text
    • https://fizafadolozu.files.wordpress.com/2020/11/31713389540.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/black_butler_season_1_episode_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3647043-3899-41b6-b2fb-6f5e8ed62c03/wedafifituj.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b803.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB803 24056 bytes
SHA-256: e091923d5d7c8497a80a7b81253b01759f4621c961ee5b2b94cf6a74741bc545
font_00_sfnt_off00007aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA8 5568 bytes
SHA-256: 517b8dfd8b6b27c73b0a515464ce7f68f037c8867a3f35779a51c74f71fe5399
font_01_sfnt_off00008da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA7 13032 bytes
SHA-256: f9765ee1e08a7c5309fdf2dd801f42fb9916f1f2df23f94f9252ce277744ff26

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