Malicious PDF — malware analysis report

Static analysis result for SHA-256 562925cbfabe0f6f…

MALICIOUS

PDF

73.0 KB Created: 2021-03-27 12:32:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2b6c39d65bad608f353fffff1c9cd09d SHA-1: 5acd69ec2a58f43d84504b37c9865daf5e4b88af SHA-256: 562925cbfabe0f6f8aa1064b9d3fd3371e81df99a5b153938092738b1b81e567
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF document contains multiple embedded URLs, with at least one identified as a link farm on disposable hosting, suggesting a malicious intent to redirect users. The presence of heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS', along with ClamAV detection, strongly indicates this is a phishing or malware delivery attempt. The document body, though heavily obfuscated, contains keywords related to 'reimbursement form' and 'invoice', aligning with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://midufefew.ru/award?keyword=allianz+reimbursement+form+pdf PDF link annotation
    • http://dsv-trening.ru/how_to_install_profusion_heaterr1jx8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450440/normal_5fc6f61b796f1.pdfIn PDF document text
    • http://iminn.ru/941834370456fu05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_604e296b3d86a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404113/normal_6050dc9c21ab5.pdfIn PDF document text
    • http://instapriz365.online/2004_dodge_ram_1500_idle_air_control_valvexrqsf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402932/normal_5ff826d5427b6.pdfIn PDF document text
    • http://kersita.space/foodservice_organizations_a_managerial_and_systems_approach_9th_editionh6c7t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tefabonapo.rf.gd/verification_of_ohm_law_experiment_lab_report.pdfIn PDF document text
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_22ffbda6e90b488eadd601ee30469146.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/000c1bf6-9e23-43e6-8c9a-7d0b826c2aff/how_to_write_a_good_news_lead.pdfIn PDF document text
    • http://bulagim.epizy.com/86301683014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3a4c212-2efc-4e61-8265-0425a28ad57c/duxesupolozije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61104bb-b6ec-45b1-9b57-c6e881d3f76b/7243868141.pdfIn PDF document text
    • http://zuwididag.epizy.com/20237785232.pdfIn PDF document text
    • https://cc4f1b1a-08c7-467e-bb5a-e3073ad8caf1.filesusr.com/ugd/ffc175_77295614f5d24f6988285f6d1423796f.pdf?index=trueIn PDF document text
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_795c9d78efb2420fa7e7a5bba2dac05d.pdf?index=trueIn PDF document text
    • http://makuvekate.rf.gd/how_much_does_it_cost_to_take_photography_classes.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/dd_4e_draconomicon_2.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/bi_ht_m_ngun_cy_trng.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4cf1721-06bd-4535-9ef7-9c4ac9166af4/51329604492.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/74298541667.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/ronunamiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb49d799-e9b7-48a6-8929-122e9f3b751b/lonely_planet_japan_book_2020.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD44 5368 bytes
SHA-256: 0002c4e355c014ecefb7583d300324b25999a985eceaae37919a5561f6756cdb
font_01_sfnt_off0000ef73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF73 12168 bytes
SHA-256: c63570528bd82b1d313fa761fcdf5635d9246e3e2182dc008cc3ca832c4ea94f

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