Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2c07d6c106e9af…

MALICIOUS

PDF

80.3 KB Created: 2021-03-13 13:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0c6f47146a9f6947e763c43c6d9f592e SHA-1: de1c4a6ebedee6cbc499626d431103e06751b82a SHA-256: 0a2c07d6c106e9af604b9afda759bd442d09014e78510a32c06ba1b67089aa32
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://druttle.ru/wix?keyword=samsung+s390g+unlock PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481056/normal_5fe7c24641b47.pdfIn PDF document text
    • http://bepevekebezupu.22web.org/pizukopabajasarewigo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461498/normal_5ffea5bbe5772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_5fe856ca80d3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446774/normal_5ffc94c9a4502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379477/normal_5ffb35805df1d.pdfIn PDF document text
    • http://trenolgia.buzz/diary_of_a_wimpy_kid_deep_end_release_dated8k75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470977/normal_600a879b1affd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462345/normal_60125897dd8b7.pdfIn PDF document text
    • http://best-store.club/catan_classic_apk_espaol80951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483591/normal_604ba09334baf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451970/normal_5fe51a1de8c47.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/7f2d6fd7-267c-4690-84ad-2bd3e4fbe785/67822517954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c548bd34-7631-4730-947e-fd21ef06b629/machine_learning_con_python_raschka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8fc5cbd-8389-4121-bbb3-cce7a926d445/lasko_portable_electric_42_oscillating_tower_fan_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98346ad2-b4e9-462b-84be-8670ed3694ac/kitchenaid_artisan_5_qt_glass_bowl.pdfIn PDF document text
    • http://babupit.epizy.com/94248569670.pdfIn PDF document text
    • http://bidififi.rf.gd/67063702640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd6d946-ded6-42e6-b19a-5128e9092778/38335391084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929b0f1d-954f-449e-904a-05a3a740a0ce/how_many_amps_does_a_charger_use.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF96 5652 bytes
SHA-256: 8a43b6d7e1bf93533405458fc7bb774f6e33fca7ea887dbb590a7b87c79ea6d5
font_01_sfnt_off000102bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BC 1936 bytes
SHA-256: 21a7146106e2ad29a4dcc6aa55cee169416400570e2b3d493b6d071cb256f2f3
font_02_sfnt_off00010bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFE 12356 bytes
SHA-256: 91693f56013d22c56ee6148c0e3799de4fd9f9e7ac48f096f1c179290034cfa6

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