Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c00171b0b07c734…

MALICIOUS

PDF

73.4 KB Created: 2021-09-06 09:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 73412e03aedf78d46db6be250489e887 SHA-1: b13ab8c387d47ca1f4a5548e089264fa7ec2ab0b SHA-256: 2c00171b0b07c73456ddc635ebd32d841310348adc2f4ed6ef342976777f6c5d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded JavaScript and a significant number of external links, many of which point to compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links. The embedded JavaScript may be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=yokogawa+centum+vp+dcs+training+manual PDF link annotation
    • http://studiosiciliani.eu/userfiles/files/41451315915.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/72586116880.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/57948468582.pdfIn PDF document text
    • http://hudsonohiohighschoolclassof1980.net/clients/7/7d/7d4b1ad73701457990394555a34ab01f/File/3096258016.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b06f8bc56f---xexabotuxogonuwulukevif.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210827_021230.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/bulalobowaneli.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/bujukejefetoziwufi.pdfIn PDF document text
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/tofosaremepiwivunowe.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/41365384020.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160865cb084f70---temutotewo.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/34587454537.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9fceae7dd---3193842668.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/qh44cumu33tag5mtm9ie5s986p/37558243218.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160854943e5424---nojukogepajobolekilubefo.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/75296802745.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/numavudukuluzasikebudi.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/74c00d71b790043a25788240544cc0be/wuwekagodonomofuxa.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/eb52adb005d9e46ef56c5e82684b42d7/vowutijisoko.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c21c4793ae---kiretasapusotedidipudove.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/fewanojojo.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885ba4e4622---lekife.pdfIn PDF document text
    • https://palet-school.com/files/files/85630140414.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a33586b373b1638563f6120ce46a84a5/37487578158.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607faebe30368---16214481550.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://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_off0000bf65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF65 16352 bytes
SHA-256: cbfeda070a66086b20919780f6aabfdc36726e0918fbdfe2bcc348b72cdfd181
font_01_sfnt_off0000e9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E3 11184 bytes
SHA-256: 5bb6faa3b1212e6603548fdf1a1bd9e451cde6f1573e8d75f0be400eb6c8056f
font_02_sfnt_off000103e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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