Malicious PDF — malware analysis report

Static analysis result for SHA-256 048c4e421eac6e93…

MALICIOUS

PDF

126.7 KB Created: 2020-11-08 23:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c8b7db9583924d70faad25bab2a4a192 SHA-1: 43110acf3f2932f70fc61f53759bf657d4100348 SHA-256: 048c4e421eac6e934df7bff038634e44f917c5883d6b68bfacbddcb28f5d746d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links to external websites, many of which are hosted on disposable domains, suggesting a link farm designed to manipulate search engine results. One prominent link directs to 'https://traffine.ru/123?keyword=the+lorax+book+pdf', indicating a lure to potentially malicious content. The ML classifier strongly flagged this PDF as malicious.

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://traffine.ru/123?keyword=the+lorax+book+pdf In PDF document text
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/jaseveposarika.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455403/normal_5fa1737db34b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f875d41153ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416664/normal_5f9eb06bad190.pdfIn PDF document text
    • https://vivenovexo.weebly.com/uploads/1/3/4/6/134695888/koxemekoxupamukuw.pdfIn PDF document text
    • https://xexegetogud.weebly.com/uploads/1/3/4/3/134375989/topuzujal-setirezigaf-molobamafi-vejagowurodoji.pdfIn PDF document text
    • https://rineragafuvotut.weebly.com/uploads/1/3/4/4/134442037/39892e5ee65.pdfIn PDF document text
    • https://gonupedifi.weebly.com/uploads/1/3/4/5/134524362/5565098.pdfIn PDF document text
    • https://sebijulevezokoj.weebly.com/uploads/1/3/4/5/134512917/c9514adee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_5fa84ddc119ca.pdfIn PDF document text
    • https://menuvudojowakap.weebly.com/uploads/1/3/4/5/134594867/2c8a1df1.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/0faaae32-7a77-4c4f-8578-9b38ee06e791/matigede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddca0bbc-5b72-45f9-89f4-bfaf2f0126d0/8586290601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3e4d199-6cf7-4509-a7e4-78ea5fd691f3/popigogisuvusifizusejet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a5590a1-777b-407a-bb57-f2c8370fa928/translate_yiddish_to_english.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/adobe_photoshop_tutorials_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/judukoseguv.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_off0001b2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2F2 5172 bytes
SHA-256: bff0a247bd293e1a07ba9ed9fed342caf5202a461ec06f24ca0b09b058c9443e
font_01_sfnt_off0001c480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C480 12320 bytes
SHA-256: 82020324b0274a0575fc87cbd778620977b0eef385c75ca2b740aecf68b052d4

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