Malicious PDF — malware analysis report

Static analysis result for SHA-256 439d2889a21458b3…

MALICIOUS

PDF

123.9 KB Created: 2021-03-18 15:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1eba452d7146c61e95c71657699d3d6d SHA-1: b1078d08c95976a39dbc41e251411d133021db56 SHA-256: 439d2889a21458b30c9a1869ec48ec39cfc668bd9a913e97d6b73a95b508d982
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated SEO-style links, indicating a link farm or phishing attempt. The primary URL, 'https://zajinet.ru/award?keyword=anglican+church+prayer+book+pdf', is presented as a search result to lure victims. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/award?keyword=anglican+church+prayer+book+pdf
    • https://cdn.sqhk.co/tuxonewebuke/SqpTJhh/12361713650.pdf
    • https://cdn.sqhk.co/mapetidul/58OQifA/74720785514.pdf
    • http://fulokixowo.scienceontheweb.net/how_to_use_autocad_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fd83593d-41cf-484c-8b1c-e18d2be05643/pugexoxominax.pdf
    • https://uploads.strikinglycdn.com/files/ec9b5edb-a8ce-43bc-ba5f-d213e6f596b8/59256736914.pdf
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_51ef150e7f154df9b64a30a56f477977.pdf?index=true
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_ec1c7497856040189bfeb6f7d5b5e923.pdf?index=true
    • http://lavoxema.onlinewebshop.net/simples_nacional_lei.pdf
    • https://uploads.strikinglycdn.com/files/458d4402-c3d6-4768-892e-9cca154a76d5/instructions_for_the_game_of_life_with_pets.pdf
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_7e66893023a244dbbb17208663016c93.pdf?index=true
    • https://uploads.strikinglycdn.com/files/60ace68e-a6b4-4893-abf1-99262d2bcf56/cochlear_implant_manufacturing_process.pdf
    • https://uploads.strikinglycdn.com/files/d506a7d3-44f5-4cf8-bd7c-6240414c3fa2/jawavagebezizo.pdf
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_67a71728b1444f10b36f55df2702c290.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017fa2.bin
e326bef3bea7d00b5e5cf97e70358ab788d43c471b6d0fdb5142891019ea4a63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17FA2 10144 bytes
font_01_sfnt_off0001a129.bin
983fac5dcc83815cfd112c8794759eae5c6f88f3f2861a437243e1f312ac6c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A129 5536 bytes
font_02_sfnt_off0001b402.bin
73f2bba2dde5f3ba65f32b133dce5b13edc28bec51c3c8635318b9f820753022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B402 15696 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.