Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1852e096e25168…

MALICIOUS

PDF

174.9 KB Created: 2021-04-17 22:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ec152259fca9888d9b0c896fdea6141f SHA-1: 13d2dc7ece7efc11b3418ff0a655218460266769 SHA-256: ee1852e096e25168e606b42798f6df7e30f85731ee9604f9778a7a75f8c509d9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://crophysi.ru/strik?utm_term=burger+king+breakfast+ingredients PDF link annotation
    • http://jatemiju.22web.org/excel_formulas_if_then_sum.pdfIn PDF document text
    • http://fowujuli.iblogger.org/kefesa.pdfIn PDF document text
    • http://vobafoselalulor.mypressonline.com/6424222624.pdfIn PDF document text
    • http://dokarukaxita.22web.org/encyclopedia_dictionary_free_download.pdfIn PDF document text
    • http://xagevogewa.medianewsonline.com/how_many_kwh_does_a_tesla_model_3_long_range_use.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/7c29437d-824d-4880-bed9-c6a9eff51a84/psalms_the_prayer_book_of_the_bible_by_dietrich_bonhoeffer.pdfIn PDF document text
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_f7f257d6d9a54b1e96be1d79bd372a0f.pdf?index=trueIn PDF document text
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_c006797632ed403c8aad071b97212499.pdf?index=trueIn PDF document text
    • http://tijelide.rf.gd/67387368691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c395cfb3-9363-460b-9d35-3eefcac8f522/nanostation_m2_access_point_mode.pdfIn PDF document text
    • http://pusapiwa.epizy.com/vorasenuju.pdfIn PDF document text
    • http://kemixirutuj.epizy.com/66514333921.pdfIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_9ff67bf2711748aabaefa1d9cc10a808.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0449885a-cb2c-4ee4-afbf-c45303a7e146/us_history_quiz_18.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d510810-069a-4a8f-ac22-03a3f70fa4b1/what_is_the_theory_of_falsifiability.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9bac973-5303-4141-a523-43fc2d3f0a87/2931246620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/601bf6c8-d159-41f5-95bf-68d71208641b/bamafafexilivaparur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e441bccb-fab4-4506-b43e-e8d06d58dd9e/the_crown_season_2_episode_5_speech_real.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932e1e8d-e5b9-4f6d-ba00-1f7f8e773b25/83775317208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d5a23b4-6a29-4ac9-a7c5-1d309b08fee2/master_forge_grill_parts_l3218-1.pdfIn PDF document text
    • https://ebd73b9a-b255-48a5-b781-2bd84b483b4c.filesusr.com/ugd/956c05_8a5047aa9e654acdb2c5455be36b0f38.pdf?index=trueIn PDF document text
    • https://e1cd7dcf-8988-4be8-9b1a-722367337987.filesusr.com/ugd/6203b9_1549be19b92e4e5ba67cd6958eabcc98.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002620c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2620C 5068 bytes
SHA-256: 0532d4ed9af921cc3f4e455dff9c5bb37438a9b3258bf3cc1991c96672c04cb6
font_01_sfnt_off0002735b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2735B 13016 bytes
SHA-256: b2ae16104f7ea882ba2c49f7204c1d6918f858ecff600adee3a964cc6de467ab
font_02_sfnt_off00029f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29F0C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e