Malicious PDF — malware analysis report

Static analysis result for SHA-256 03127bad1aaf83ff…

MALICIOUS

PDF

109.3 KB Created: 2021-09-06 11:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 04e5ea81fbf2fe3a10fceaf7ea95cda4 SHA-1: 7625a6f4c3aede990c77e79543980216e62faf70 SHA-256: 03127bad1aaf83ff8d3a423c51b322807351993f86a94473ec9e5e2a2c436ba4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a phishing or scam campaign. The presence of external URIs and link farms indicates an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://allytemp.ru/uplcv?utm_term=test+automation+using+selenium+webdriver+with+java+pdf+free+download PDF link annotation
    • https://www.autopsrus.com/ckfinder/userfiles/files/2585502803.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/66782269310.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/sapapa.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/sajitasemomozatid.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/0b764a124224412f41de3888f608111a/60794017836.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/basikavoxonu.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/43144174457.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/14351343834.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609833512370b---42702817611.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607056cb00daf---82699195423.pdfIn PDF document text
    • http://tongkhomica.com/upload/files/18410887822.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160dce703483cb---43479641578.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/jufafapemovujun.pdfIn PDF document text
    • http://ymy-tea.tw/upload/files/27201705889.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/d18d03dfae2158aec24ceb8cbc201734/19527970004.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/42622724229.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/2b45cf902ac46e7f05d43d0cb4443813/16736687824.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161124ad59dfd9---xovumawovipaduvo.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/a6589f59d689f3280d7e20806d2f8c6d/nenakefoluxikifomoda.pdfIn PDF document text
    • http://mamam.by/upload/File/file/3900475154.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/id1l0r4n3mv0c667tikrjiikrm/53476640168.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/c16b7585de2acc9f8223998579042d8c/33474067629.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/36046395338.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160f88481d8e17---deranesiwegufujagujif.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/sufokulopineporava.pdfIn PDF document text
    • http://regmac.net/userfiles/files/5054794164.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/22559429187.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://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_off00014118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14118 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001592f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1592F 11428 bytes
SHA-256: 7bd494c2ba4540a93b4e5ddfda630ffeb0aec469a110770eb41cb44d47e7b596
font_02_sfnt_off0001738f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1738F 19412 bytes
SHA-256: 063ca0b00098c7166b552033d8396d908493ab6ae228b2a01827990d705b1452