Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc9c653062e63cd…

MALICIOUS

PDF

45.3 KB Created: 2020-10-12 10:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1adc45d97d5ec7b307bfb855354e465a SHA-1: 21aa2bee2e9472a213e79f07d82e22d074cbceda SHA-256: 6fc9c653062e63cdf67ef9b05adf9d2fa03b82b3367b4554f3d33772046312ba
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://ttraff.com/pify?keyword=avee+player+pro+apk+free+download In PDF document text
    • http://files.fightingthebs.com/uploads/1/3/0/8/130874261/fobadojexevaxuxox.pdfIn PDF document text
    • http://jegef.reptileecologylab.com/uploads/1/3/1/4/131437241/978fa26a.pdfIn PDF document text
    • http://files.fasttrack.cognitiveguidance.us/uploads/1/3/0/7/130740256/a864e21688947.pdfIn PDF document text
    • http://files.shandonpistolandrifleclub.org/uploads/1/3/1/3/131381607/woxalawideraka-livizukufamal-lixij-bedigagigidiv.pdfIn PDF document text
    • https://site-1039577.mozfiles.com/files/1039577/97137860474.pdfIn PDF document text
    • http://boneso.stfrancesbasketball.com/uploads/1/3/1/4/131453741/f71994dc8.pdfIn PDF document text
    • http://dumiw.liveoakchildcarecenter.com/uploads/1/3/1/3/131384098/a8d5ff6997b77.pdfIn PDF document text
    • http://files.sunflowergenetics.com/uploads/1/3/1/4/131413550/e14484bb46d6.pdfIn PDF document text
    • http://dibume.veeartsy.com/uploads/1/3/2/6/132695818/tenomanu-lexuzoretili.pdfIn PDF document text
    • http://files.ncbdfcs.org/uploads/1/3/1/4/131453645/c8688545988b58.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://uploads.strikinglycdn.com/files/349b03cf-75af-4d66-9d3e-6f99d7d4483c/51506004874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef58d7bc-cc6d-4e9e-91d8-a92bfe458225/miwinosokidutetuzus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/999c09a8-0d7e-4ff8-abc1-5e0105ead971/nomoxofeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e1e181-0880-4a89-ab80-d629230abadc/mamisuxozidedilomepeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/957483eb-c225-4a9c-bffa-dfa5e21c902d/52883013258.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_off00006759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6759 4824 bytes
SHA-256: ffefd38e34375d000f6f96e3cec03d2f4a626276392c6f24ecfd398be20d8d24
font_01_sfnt_off000077e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E8 10100 bytes
SHA-256: 39f335576bd09a1110b70ed84fcad71a7698fc500814ea09aeaf2f45e37947ca
font_02_sfnt_off00009a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A76 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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