Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2447212e29930d…

MALICIOUS

PDF

77.7 KB Created: 2021-06-29 09:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a74fd09bbf03321828c55621954b091f SHA-1: 9bcc7ce6d9976e29c198ef6dc454dbd3b469fb14 SHA-256: ba2447212e29930de91a41be123f093c687c4ba5de4f3edc258c79b7b66c5ac3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to compromised websites, which is a common tactic for phishing or distributing further malware. The presence of multiple links on disposable hosting and compromised CMS upload storage suggests a deliberate effort to obscure the final destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608048fe65975---17559705886.pdf In PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/51d2f4120687498fbd4a730c037a4512/85114399336.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/fakilujodaf.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f15caed595---35486903010.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/g4q6ad57gjt3nvj0sq0n8ncvn4/69896484768.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b3vdi3dp83mt0jcf6drcgaj2r4/96914090095.pdfIn PDF document text
    • https://proxus.nl/file/guniwidoze.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/regixixof.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/eab82a0065600d866ed165a2e2b3b375/nadigijibanabawo.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/e0rsa5qf8mhl006dculrav6eo7/85263505366.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082be2b71603---tawumupigamujizeragu.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/367edc223c08f191616ff80f801116e4/tavikosaluv.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/galapugajev.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/kemem.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608679cddf560---27621562582.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/buxefa.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac100049fb3---26513476075.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/wanodupexupowokebagi.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210618_200603.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9eab30cb2---soxodewoxamuzip.pdfIn PDF document text
    • http://russia-ex.com/badila.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16083646f63e2e---49546979305.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c75b6d0b0c---19844392481.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b7608544e---27934160925.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=glencoe+precalculus+chapter+2+answersPDF 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_off0000cda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA3 16560 bytes
SHA-256: cfeeadd7c91a8165bb9987d2840edd0da24bcd676afaf7cb5325d29cb1384a7b
font_01_sfnt_off0000f87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 10724 bytes
SHA-256: cb95d6e8ef91e9804d65d8809046b0169658e28d852db88e6f8f8617ee44d835
font_02_sfnt_off0001113d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1