Malicious PDF — malware analysis report

Static analysis result for SHA-256 328d2a5a2cf69d8c…

MALICIOUS

PDF

82.8 KB Created: 2021-06-30 22:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: efd20d56428b2b5f5bd6d76582c03851 SHA-1: ec5e2496ca7f4e14715994c585a26512fbb12d44 SHA-256: 328d2a5a2cf69d8c4fe3f242097202a727ef4033ffc1ed3584da815c7e07f5b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The presence of numerous unknown URLs suggests a phishing or malware distribution scheme. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://donauwell.at/userfiles/file/dopoxetomuwerovemuxusu.pdf In PDF document text
    • http://abnicum.com/files/file/31611962120.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/nezopomapuzobo.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6b34ee2b7---27462393780.pdfIn PDF document text
    • http://uctodane.cz/UserFiles/File/ronasadifaleleseguj.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bad267cb9---jefolixadikupagusof.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/25941503720.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160c18b5f5f2a7---wigotadolopevutava.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/zipabemo.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/31d01d9d7afb970c6682dc915115c062/pixobetu.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/19992405521.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/486b3ae6f98acbd2e8be1b36215b9b9e/11470300479.pdfIn PDF document text
    • http://0930actress.com/files/files/57866975080.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858bf1772d7---junujofajogafut.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/22861159683.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/suda61kcd86v2b63up2q8fvi06/siwonofona.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/zogasogir.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/mulawevugesopadi.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4c3ba783a---feputepewatowezufe.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/35122672043.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa241db700---86299649908.pdfIn PDF document text
    • http://schnauzermountainminiatures.com/clients/17729/File/debimebolabe.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/71c3789a493db6a91056b4c0ca990841/kujujagewarob.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac67a5cf31---simomiwelegaluxigoxitilu.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/xoxasuxuke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=cracking+the+sat+chemistry+subject+test+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDE 18292 bytes
SHA-256: 2fbd9911328f36939a004b407e0c2f3ced2410684254e3ad17a9046b8247bccd
font_01_sfnt_off00010ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DD 11508 bytes
SHA-256: c523fb560d0fbe6c31854f3b25ca74bce3072b1691b432412a626551f0b2367e

Open this report in the interactive analyzer, or submit your own file for analysis.