Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d98f53ed687df8a…

MALICIOUS

PDF

74.9 KB Created: 2021-03-09 03:01:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ef00788523e3bd837049a75b4c1dd3f2 SHA-1: d70c50a4fabbd3b7726709bc3ac709a7143e9548 SHA-256: 8d98f53ed687df8a3517a77a8d5e730df758a389a61e1e7ad4235c9d07bf2210
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection for phishing and trojan activity. The document body, though heavily obfuscated, suggests a lure related to 'Changeling the lost second edition character sheet'. The presence of external URIs and link farm heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://lozipotod.ru/123?utm_term=changeling+the+lost+second+edition+character+sheet PDF link annotation
    • http://milesnires.xyz/mibinoderiledetobapogumad42czw.pdfIn PDF document text
    • http://vvd.bar/dijixizerorululamg0n0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483864/normal_6005d23ceabc4.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/lisavuzovezerivabalakosiw2v11t.pdfIn PDF document text
    • http://zarujosusaxom.22web.org/nokowiwanamuzaravewaga.pdfIn PDF document text
    • http://zeropium.com/726712990019gw6o.pdfIn PDF document text
    • http://tatajosak.22web.org/free_halloween_party_invitation_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369914/normal_5febc9e3e2686.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://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_9ecea9f18c4c4dddad32080b4bad646e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8ef27d-6dcb-45cb-8aff-8820c6644920/libros_en_espanol_para_ninos_de_primer_grado_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/502ea859-6288-44e9-ad12-64c5dc1606af/jomedoki.pdfIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_d2b216997b584b188657b9088c2171fa.pdf?index=trueIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_bd8e611b92d24f88848d8da73b3d4b6e.pdf?index=trueIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_ceb6df7d24574755b01c941acb32aff1.pdf?index=trueIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_05bde21b3f19478bb9e1d2d1c4b03371.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0578bcca-5db4-4bd5-9b6e-dfd4cee7e6a0/ashab-e-kahf_islamic_movie_in_urdu_free_download.pdfIn PDF document text
    • https://91313464-3f42-441e-b0e8-b27065d471ad.filesusr.com/ugd/ee9d3f_2e7cffe1a0be4c0a8b809d8e1520ff96.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/084a2aa4-98a3-4ebb-8e2b-b77879c35b86/brian_tracy_goals_audiobook.pdfIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_2d209ae0c2f94e6bbdfe79e45771075f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01fedb59-547b-404d-868d-71ce4559f72c/norigov.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_off0000da7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7E 5012 bytes
SHA-256: 30dc235e518008b4385bcb4e2494faf482cffcc552bcea6ebb634879704e414c
font_01_sfnt_off0000eb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7A 10584 bytes
SHA-256: 3659f39cf1f9f565a24371c91b47ece746c51bc04bbe682bf35111af914ab267
font_02_sfnt_off00010fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378