Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2fb08e608e0001…

MALICIOUS

PDF

72.8 KB Created: 2021-03-11 19:56:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: fae325aef2f21d80137efa7022757474 SHA-1: b00f5cd3dace35c21a519b90051d412d8fd512b2 SHA-256: ee2fb08e608e00011485757946ac3c08e9b1fc0ce922a93e05f9fd36a8f6cc64
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, with multiple external URLs, one of which is a sales receipt lure. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, suggests it is used to facilitate the redirection to malicious sites or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://soxebez.ru/wix?keyword=sales+receipt+vs+invoice PDF link annotation
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/wilutubekenavu_nisak.pdfIn PDF document text
    • https://dijajogid.weebly.com/uploads/1/3/0/8/130874349/xilumit.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/13331097368.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/who_are_marginalized_communities.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/tapanixinesigipirarizag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_947e0130c7924806a3628e8e9e4137e0.pdf?index=trueIn PDF document text
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_6a82036d0a2743cab2f0456abcca8273.pdf?index=trueIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_7a99c6e1ed4e4494a6db1ae163af91e6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c6bf06e-dac6-42ab-a20a-0aed635003cd/zovoxoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd8c1b4e-0ce4-4890-9898-af4b84b2f5fc/how_to_use_yeti_microphone_with_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/59302213588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c753cfa-28fe-4cb0-be81-fa45eaead8ce/where_is_the_high_limit_switch_on_a_goodman_furnace.pdfIn PDF document text
    • https://44dd6259-7513-41c7-b2f1-b2b1fc385d2e.filesusr.com/ugd/63022f_f862e83ea66945b89d8ca41a50e0a9d4.pdf?index=trueIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_944eca9921014b0f850c04973e438db8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0484fc0-1a1c-4298-90e5-8d5852aa9969/best_bodyweight_workouts_to_lose_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/151d7fb7-59be-48cf-9e9c-cae7acb78e8f/46153424006.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/guardian_egyptian_text_font.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/23783125701.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_off0000e12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12B 5088 bytes
SHA-256: fd1cc02378e5790c76fae44f692caf17195ead82fedba8a73b0721576946f109
font_01_sfnt_off0000f28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28C 10380 bytes
SHA-256: 67417d7bda2b4d074b56db607d9d661ed2f19947affdb0f1e1bf3324fe51a79e