Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1fa518e8621ed9…

MALICIOUS

PDF

53.2 KB Created: 2020-10-15 07:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 62bf37c23629ae7f431367fd7fcc1754 SHA-1: 5b857c5a2f28e93a1ddf0ba3beadbe15cc45ec6a SHA-256: 3c1fa518e8621ed981637a1a961714a863bdda219fe3eebbb0940b757a0054ba
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=fire+drill+training+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f874da7e99ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f87b33486b72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f871261007ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f87658f859f5.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/repetakoxowetelin.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/zakeme.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/f5df2391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f87548a41d12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f8724956f270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f875ab919382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f87b87c73083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f874d172004f.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/kezupukono.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kirorafagosox.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/lefuneni.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://cdn.shopify.com/s/files/1/0480/9641/1812/files/oak_leaf_identification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8683/0496/files/4000_x_250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4779/2021/files/nuclear_fission_and_fusion_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6799/7849/files/city_of_austin_recycling_ordinance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5460/0870/files/kerolafifuwakinuxadukig.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_off000084a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A5 4696 bytes
SHA-256: 7b7403b7b146a529c0310ef6f2a5f3588b4780ded05ca93959869e9041845a1f
font_01_sfnt_off0000946e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x946E 11236 bytes
SHA-256: f17a1ce623f7b0a27bc13e0a91e9d6ab40a1e3d2df765758567db8e10b3d7023
font_02_sfnt_off0000b8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361