Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88856bbf8972704…

MALICIOUS

PDF

80.3 KB Created: 2021-05-22 19:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8b7b6b23885a624c72224dc8676ee280 SHA-1: 519d287d8d1fb9155eb03f344bd6e67a76a6a8dc SHA-256: e88856bbf897270403e34729f3368333024e7999d884ccd505e1522752b0e91d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains references to account creation and a URL, reinforcing the phishing or scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://vilenefex.ru/strik?utm_term=how+to+create+my+uan+account PDF link annotation
    • https://livesagu.weebly.com/uploads/1/3/1/4/131437401/0d7172b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379231/normal_5ff3bd822a62b.pdfIn PDF document text
    • https://fuzimisadu.weebly.com/uploads/1/3/5/3/135319831/7c20ad2cbe.pdfIn PDF document text
    • https://nisikigibifug.weebly.com/uploads/1/3/0/8/130813528/sapimurus_tupozivanura_jifegu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409627/normal_606a9b6ac4893.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c22afd1-4ac8-4f1f-971b-0431f5cefeb7/which_book_is_best_for_computer_science_class_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b74abbf1-1715-47f1-8004-052990465753/niliveduwixujefobos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc87d69-2d82-4550-bef7-85607a91bbc4/latodidikoxedikawezisobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d54373d-38f1-4e7c-87ca-0f6e03dce8d5/prayer_rain_live_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8019c6c5-ec51-45d0-8f1c-9175a9645899/how_to_fix_code_13_on_furnace.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/xonogokodobigevetukaj.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/google_camera_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ae04ab5-d536-49bf-aadf-77cb16390240/bersa_thunder_380_cc_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c1ebcdb-7d3e-470f-88c2-c35917ddeeb1/a_christmas_carol_book_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/xexikexodugetaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69039dcb-51dc-4ee1-a62a-009f4582b88d/how_to_label_circumference.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29fcdd97-1286-4a91-acc7-7d001eba4f72/42410667111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98b445d9-f60e-4fbb-b809-b5fc993ab7c1/reinforced_concrete_beam_design_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7154568a-c2d4-4ccf-8bdb-f3ec9791eda1/78692749286.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAA 5652 bytes
SHA-256: 1a256719a8a201eee6bed95512dc12e94bb2565116a60a8dba72c4545d50d62f
font_01_sfnt_off0000f2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C2 4892 bytes
SHA-256: 4046eefef9ca31f604c5bd4e4fa8f7fe41f0cb68363955c6118af253dadc41a6
font_02_sfnt_off00010360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10360 10412 bytes
SHA-256: 775d0eb9d883232e93b8869b4af5d9c4644638e7b254d9c204d84c5a693a9ae6
font_03_sfnt_off00012708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12708 3040 bytes
SHA-256: c4f2ce5dee1d06ac3d616a7774a8d1692cd4c1367f28fd0da498446ac93ca423

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