Malicious PDF — malware analysis report

Static analysis result for SHA-256 f134a8ef21d80dca…

MALICIOUS

PDF

41.9 KB Created: 2020-10-14 21:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 96577f6bee8a1268a53594db19597247 SHA-1: faa805d7a3cb3d705c463996064a7cee82482893 SHA-256: f134a8ef21d80dca5249b74600ea19a01398c3e656708775a35135feb43f3473
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://ggtraff.ru/123?keyword=a+dios+le+pido+letra+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f8727b7421f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f873a9d023b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f86f95fa0ed9.pdfIn PDF document text
    • https://site-1044202.mozfiles.com/files/1044202/22487491645.pdfIn PDF document text
    • https://site-1042025.mozfiles.com/files/1042025/fukaxomamavosi.pdfIn PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/29345655157.pdfIn PDF document text
    • https://site-1039378.mozfiles.com/files/1039378/79599520794.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/1/0434/5767/5431/files/the_rhinoceros_play_themes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5850/4092/files/30098068851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7715/7542/files/ap_chemistry_test_2014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5317/8791/files/57172377983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7864939d-ec3f-4307-a9e5-795087d6e685/43226166698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3da49b0-dc5a-4381-bce6-acbaee720b41/33862656111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d69a5c1f-5fda-4c23-8dd2-a3347a3b7e00/lijidekupegeziwanibijak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d4920d-5a15-47f0-8763-525784f84b42/perataza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9017/4886/files/pavafavulawabojolile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/for_honor_tips_and_tricks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3355/9708/files/josh_groban_closer_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6342/7751/files/canales_de_cable_gratis_en_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9707/1002/files/visit_a_wooden_rabbit_stone_pig_map.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_off00006367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6367 5024 bytes
SHA-256: 3facde7fa78b66f98b3991218ce7dcd5af46663de913751ad4a09dcd0fd09828
font_01_sfnt_off00007488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7488 11200 bytes
SHA-256: 37a20e955064206f641c08fa366593f111dadf789ba7f212c2a514b5d3b3e8d0