Malicious PDF — malware analysis report

Static analysis result for SHA-256 37299691ee83c733…

MALICIOUS

PDF

42.7 KB Created: 2020-10-28 15:35:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8499e494a5be20e878a577dca64fb36c SHA-1: e49343ac3f4d6c5779e009c1479e901e5744d84f SHA-256: 37299691ee83c733e333df5b7871e489d5d8b851f024e9c17253035260e9d068
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, also contains URLs that are part of a link farm hosted on disposable domains. This suggests the primary purpose is to lure users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://gettraff.ru/aws?keyword=circular+reasoning+examples+and+explanation In PDF document text
    • https://gixapogaruxa.weebly.com/uploads/1/3/4/3/134331356/tidumoneriluza.pdfIn PDF document text
    • https://zodowiburasuv.weebly.com/uploads/1/3/4/4/134448486/46042d160b.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/gimodutip.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/d97e3c3962756.pdfIn PDF document text
    • https://rizenorugeworo.weebly.com/uploads/1/3/4/3/134379336/120f05719aba0e6.pdfIn PDF document text
    • https://gumiworawogulaf.weebly.com/uploads/1/3/4/3/134356348/kirebamupabew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leguvefu/ginger_and_spice_and_everything_nice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/832395f3-f62e-42e6-9fff-dcad34bc4888/23073045213.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/cara_menghapus_watermark_di_adobe_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/solet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98421230-a55d-45e9-a5ab-da68efd79a35/80098388339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c18c736-5c91-4d77-bdce-9912fa0a4b47/37862224113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e346eef7-088f-408a-a779-426c6c0a2b2b/xiburajesajulosewaweneka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f37b6158-ba17-491a-837e-5747a459bb23/70586972652.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/vogitejuzodapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac0377f-2cb2-48cb-bd93-0cc7aae14d18/52663661581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7786646b-631e-4283-b4d9-74e15bfa17c6/muludujeribawivojiber.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/82926468813.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/gejedojuxuxapove.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6707 5364 bytes
SHA-256: 83b3bbd7171b3aa3e612ff7f7af586b5fd8bc33917b049b190ed39b57933a952
font_01_sfnt_off00007931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7931 10840 bytes
SHA-256: e322a6b7bac7ff904e347c748e5f5f93272bf6d6899a0ca4b965836a7fb9a0e0

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