Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7af7a5f35134f8…

MALICIOUS

PDF

104.2 KB Created: 2021-03-14 23:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 819dedc8a4414c96e4262cc74dc64cb2 SHA-1: db87914be725d382774d4e5758b4fd4123eb6a7b SHA-256: be7af7a5f35134f8c7a4ce5d675a0a451543d967ca32e8002da75f31ac72624b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://druttle.ru/wix?keyword=garmin+zumo+660+manuale+italiano PDF link annotation
    • http://fulilip.iblogger.org/bawaxogamosepojixipadak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369322/normal_6001e4663ef22.pdfIn PDF document text
    • http://gakofanotizukab.22web.org/59603142444.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418987/normal_5fd5fa3a5de59.pdfIn PDF document text
    • http://fullstacket.online/62948345707pwwag.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/penuzefiwova.pdfIn PDF document text
    • http://zarabatyivat.ru/gibuwujufamaxeqgy3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447877/normal_6026e5d160f6b.pdfIn PDF document text
    • http://soluzixod.66ghz.com/bixan.pdfIn PDF document text
    • http://lejidakoxinetog.mywebcommunity.org/third_conditional_exercises_perfect_english_grammar.pdfIn PDF document text
    • http://dedotiroviwef.22web.org/gugazovuranutijinef.pdfIn PDF document text
    • http://bovibuvebus.getenjoyment.net/sloan_flushmate_recall.pdfIn PDF document text
    • http://www.opentle.orgIn 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://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_b614777de8a840dfb413a068de241939.pdf?index=trueIn PDF document text
    • https://c0e8410b-c394-4b36-8083-179878a46647.filesusr.com/ugd/d4b1dc_06a5247d1fbd4dbc8e385f561441a6bb.pdf?index=trueIn PDF document text
    • http://ludezowitupaxel.rf.gd/vivah_full_movie_720p_worldfree4u.pdfIn PDF document text
    • http://xivajaraseb.rf.gd/wojunuvexonowobafel.pdfIn PDF document text
    • http://borarizi.epizy.com/fuvilibojijemisojimaxiro.pdfIn PDF document text
    • http://gadunekubajip.rf.gd/selozumexidaleduj.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000113ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x113AB 15508 bytes
SHA-256: bafb998a5673e19b2a8f4b57ceeb9ab3ee122b554c6bb16b579218760f60b8ab
font_00_sfnt_off0001031c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031C 4912 bytes
SHA-256: c51ca4c1a907b9d68011306dd94c5af974d6f06d4ad2dfbb5a1f902264030504
font_02_sfnt_off00013e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E30 12652 bytes
SHA-256: 88005742bff24cbd1fce7a5ccf5599e18c06c36b95fb39bebf961996917ea10c
font_03_sfnt_off000167c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167C3 18268 bytes
SHA-256: 0d2421e3704d3493f915a554819667e6bc4b7c30e6f88bc26b0ab6f5d433e788
font_04_sfnt_off00018174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18174 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c