PDF malware analysis — malicious · e357579593de9ad0

MALICIOUS

PDF

105.5 KB Created: 2021-03-18 13:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 1e2526d2358bd547ef77fe83f4db48d4 SHA-1: abc9ea72c405ce42a4c18bf8e694415e751c57b0 SHA-256: e357579593de9ad05ce8cae17f42b3042312156602d546fb6b8dc7532225c40e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to 'English word synonyms list pdf'. No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.5124

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 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.
External URI info PDF_URI

PDF contains an external URL action
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://druttle.ru/award?keyword=english+word+synonyms+list+pdf PDF link annotation
- https://cdn.sqhk.co/dopiporajen/gjoiiha/74854918515.pdfIn PDF document text
- https://cdn.sqhk.co/xuwifoviwalo/ggidzhb/molovuposadosep.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4501645/normal_60303addba8bd.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4465392/normal_5ffab1764a11c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481663/normal_601031a5e202e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448116/normal_6011aa4871b9b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4403141/normal_5fe5a5644fd9a.pdfIn PDF document text
- https://cdn.sqhk.co/wijelukifap/ByjdFAl/tixenosebekemu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4391898/normal_5fe1397d93d02.pdfIn PDF document text
- https://cdn.sqhk.co/zenegiwowi/lji8lhh/xcom_enemy_within_walkthrough_ios.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4367287/normal_5ff5b693f3f6b.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/3e8150c0-19b6-4790-bfd8-ca39e0efeb82/asus_p6x58d-e_manual.pdfIn PDF document text
- https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_e4fc36aa981b43deaf9ffa11fbd420da.pdf?index=trueIn PDF document text
- https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_a1796b12bf0348febd700d2608d8499b.pdf?index=trueIn PDF document text
- https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_dc8f913bc3a7446fa39e4ec6d9cf8be5.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/sasufufa/82204372.pdfIn PDF document text
- https://s3.amazonaws.com/wujapu/3931059982.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9adb1e83-1e6a-474c-8a77-e1666606bd45/71673542070.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8f34d059-eca7-4b9c-98c5-9e0fc4a8b435/data_structures_and_algorithms_in_java_interview_questions.pdfIn PDF document text
- https://s3.amazonaws.com/sorogamat/26708794671.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1f685516-23c5-4a7d-9971-43b51f22b8e6/how_to_use_tub_clean_option_in_lg_washing_machine.pdfIn PDF document text
- https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_4c1025dee4724efea91f6675f2f4f5b9.pdf?index=trueIn PDF document text
- https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_5b601e4eb81c46c2977599e810466fd2.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/tozaduliwubega/mere_pas_tum_ho_episode_6.pdfIn PDF document text
- https://s3.amazonaws.com/woneketelak/disney_classical_piano_sheet_music.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00015c56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15C56	5068 bytes
SHA-256: `b001125a52391bc5b90a010d0a75d23234b6b0d6b723996fd751a2e78bac49e5`
`font_01_sfnt_off00016d75.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16D75	11348 bytes
SHA-256: `cd4c508a7816802b2649d9491593e45687f2cd2d943ea8440630f2bb19e4ca4d`
`font_02_sfnt_off00019418.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19418	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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