Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97af59ca4feb5fa…

MALICIOUS

PDF

78.4 KB Created: 2021-05-29 17:34:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 14c50980fcbfcfbbd809a4d10b999f22 SHA-1: 11d10b55831c50b325e8355f9dc12b5f1ad0a977 SHA-256: f97af59ca4feb5fa8b322081efd97b9eee453f45a07c9b5d23816bd7916f4ae7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with a primary URL pointing to a domain that appears to be part of a link farm or phishing operation. The document body, though heavily obfuscated, suggests a lure related to 'Alejandra Pizarnik cartas pdf', likely intended to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://dugedepap.ru/strik?utm_term=alejandra+pizarnik+cartas+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443598/normal_6013a15e1e565.pdfIn PDF document text
    • https://sofofiwolasaxu.weebly.com/uploads/1/3/1/8/131856039/0d2d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_601af5d327b46.pdfIn PDF document text
    • https://pimejowutaviju.weebly.com/uploads/1/3/4/4/134495028/9f6d43a1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369794/normal_604201040d5db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410983/normal_6016c10f176a7.pdfIn PDF document text
    • https://tisemadu.weebly.com/uploads/1/3/4/3/134387657/2946207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478393/normal_603cff7512ca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501206/normal_606e257200001.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/12c8c3c2-09d7-4da5-9c82-91419a604057/romeo_and_juliet_whole_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d780b10f-2f05-4be2-b7a6-a958a1d65346/how_to_work_weight_watchers_scales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/596cd169-e4fe-4749-883e-a2745c6bef9a/gotis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/811fbf5c-0ff2-4157-aa76-65a22439c613/85095887054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8893f3f8-72bc-43e9-bf0b-c9206f255c26/10th_physics_book_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f5cd402-7f5c-460f-8018-c24ff76e3389/is_ahsoka_getting_a_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de278755-5a30-4599-856d-37eaa7113bc8/46724192032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda9b897-37fe-4cd5-96be-63646ddd7743/49367820209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fda671d-f055-4b55-9284-718e7147fae9/3240424210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5941f2a-15d4-4e5f-8c95-ea7db5517fc5/coach_black_quilted_jacket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e049fcf-4d98-4a31-a651-79c4a375a198/ensayo_de_el_libro_la_metamorfosis_de_franz_kafka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2620e9af-d4b4-47d5-81c2-31a46ed19f71/kovipeku.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_off0000f42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42D 5328 bytes
SHA-256: 1cd0c7adee6828097880b2abfe02ee5ce1151f85418548c443db1b028ff1a323
font_01_sfnt_off0001066f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066F 12112 bytes
SHA-256: 12a9bec59d38199931a70f8b28e3734b008dddee4b4c48631aaa8f9fad923e89

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