Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9e01954cdac3d0…

MALICIOUS

PDF

74.8 KB Created: 2021-03-06 11:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3f0c2b7f438dda5787f548eac22d00d7 SHA-1: b12dfcc1d248fc442284baddad9cb6229c7732f3 SHA-256: 3d9e01954cdac3d020e418353cabde6dcf0d1568308efcc4baa6a16bc8043c66
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least two pointing to potentially malicious domains ('baarspo.ru' and 'ultra0.space'), suggesting it's part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to a product manual, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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://baarspo.ru/strik?utm_term=black+and+decker+smart+battery+charger+manual PDF link annotation
    • http://ultra0.space/hanuman_katha_mp3_free_downloadco2jg.pdfIn PDF document text
    • http://all-host.site/mofarekoroctnok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454825/normal_60366d79dbb3a.pdfIn PDF document text
    • http://zhk-samolet-krasnodar.info/other_books_like_the_selection_seriesyqidx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454041/normal_5fe34a1d90514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464314/normal_603360de34583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402707/normal_60145a8d86346.pdfIn PDF document text
    • http://8bitbeardsco.com/vegetarian_appetizer_recipes_for_thanksgivingdnflk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367687/normal_5ff85323177fa.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/goat_simulator_free_download_for_windows_7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://keregimuw.onlinewebshop.net/5025374779.pdfIn PDF document text
    • http://nuxibuzejapise.epizy.com/xodidepidedufakefutejo.pdfIn PDF document text
    • http://witopovuketoj.epizy.com/45379750873.pdfIn PDF document text
    • http://buwumipulufi.epizy.com/csir_physical_science_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cacd8012-5139-4738-bd48-27006563696b/tobopiganugusifu.pdfIn PDF document text
    • http://wedowif.rf.gd/wuwobaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f76466e0-3343-4dfd-bc08-e1dd243c9004/lexavamofijemojira.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_off0000e422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE422 5708 bytes
SHA-256: fa4ab076a3cb8b8eb6dc8a3feef6a9e1634a8ead43c3c5b5854c8ea0ab67a6ff
font_01_sfnt_off0000f771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF771 11036 bytes
SHA-256: 6948a9f3c732c9d542ba0033bc551a2382f18dde89e4c5c2eaecb118703080ed

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