Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd54280419ec586…

MALICIOUS

PDF

78.0 KB Created: 2021-03-11 04:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 216b975eefcd746229a4870bf1bca560 SHA-1: 4ee6039fb1dab156357e8f889e2dccad169b6af1 SHA-256: ccd54280419ec5868a7ab1f62a87eb16a2b3834e1e2f2b43eba11efbad60be74
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains, indicating a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs and the structure of the PDF suggest it is designed to redirect users to potentially malicious sites, possibly for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://nipisod.ru/strik?utm_term=how+much+is+double+orange+chicken+at+panda+express PDF link annotation
    • http://betflixguvenilirmi.com/sbir_submission_dates_202018ifl.pdfIn PDF document text
    • http://generatorsale.ru/jabanepojatifixugog4wl93.pdfIn PDF document text
    • http://axecheat5.xyz/fevupusiwirowea8.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/35cb266a-a620-42b7-a678-5013fd24c97a/11978278589.pdfIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_a822d20c227c4481915d3c2fa5a24355.pdf?index=trueIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_3648a0b23ecd468eb8f627fbcf75dbe8.pdf?index=trueIn PDF document text
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_9af2a0097e5941b4a6ba6a0aefa0a10b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3e61a6-89d6-4f3d-b894-d99227a6ff6a/are_salons_safe_covid_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd13675-8e09-48c5-908f-b5f4ea27533a/how_to_unlock_your_honeywell_pro_series_thermostat.pdfIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_26a22d6d4c8b4be69d0581cbf054c028.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee384684-a25a-4cf6-9167-ac698eda109f/86675274253.pdfIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_2fcc6d4806e145ac92168d45cc4fece9.pdf?index=trueIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_7a8563cace384754813b6a2535b4b48e.pdf?index=trueIn PDF document text
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_b4349d4a5f8a44feafdf1e9fbed11732.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab67466e-2258-485f-9d76-fa89092f2ec7/can_iphone_6_plus_use_apple_pay.pdfIn PDF document text
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_6b980ca46c3e436182d4cf110f0bc7f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/bluestacks_apk_pokemon_go.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08cd4d14-7c91-4ffd-b3b3-f2ab4b6b2b4a/does_heil_make_furnaces.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/kikilupakawopapisudu.pdfIn PDF document text
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_c9956581a2164d79b4174a74df2b0caa.pdf?index=trueIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_81a1bc89a25e4949b64f63eef1bc51c0.pdf?index=trueIn 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_off0000f2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 5812 bytes
SHA-256: a708a919e2d5c9b41ba1bd5773dc92d0d04ca1a4c5944600b35de16d7a9a1302
font_01_sfnt_off000106a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A8 10596 bytes
SHA-256: 2120a78bc851fbd10fbf2b47153bc8325c36366f9c471dcf4f3e7aa7b676b3da