Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc3a0b431a2687e…

MALICIOUS

PDF

86.4 KB Created: 2021-06-27 23:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 703e0ae451ecee74975ba05465c5bad1 SHA-1: 297942cfce9ae6c80da4f01bbdc4ced9ac946c91 SHA-256: 1dc3a0b431a2687ef11d6d072fbb7a6d9faa61f0c724656dfc1ebfceec83f51d
176 Risk Score

Malware Insights

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

The file is detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and an IP address hosting PDF files. This suggests a phishing or malware distribution scheme, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160abe29db1fed---7034324289.pdf PDF link annotation
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/053cb8b9bae33244babd5b03e78ff4da/90949807939.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/38777221528.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/juporagaza.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/0ki65r1nb1idronuq17urko9j0/xepimubikodawibaseginewa.pdfIn PDF document text
    • http://bi-acaovo.com/upload/files/30003857115.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/0b70f108098dd439b65d0b3f6e888261/wosozuxuz.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///57085392142.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/fce2217d1f081bf7d333218d89dfbc80/kukujipoxitasava.pdfIn PDF document text
    • http://cuatudongsaigon.vn/uploads/files/37531986977.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/46085651592.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/2d0e2721bafe79e5b2eb4e1ddaf628b6/nijetasarumapinibafofi.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/zoxopozisirevuzewumul.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/84634102469.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9383775385---sozagesulexumepojuzomure.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/28579837794.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb49afd0184---fokewuzazif.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/f908f238e9741cc2c459b48f39dee3e2/fafunefu.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/sevibate.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7ca7d7c4a---88531871236.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/3ctkcb01jaqmbuueobps5onkik/71760940111.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16098c3d9c8d74---luberopupemosevepex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=some+dares+for+kidsPDF 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_off0000f086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF086 10432 bytes
SHA-256: ab0d9ae5396641bc334a684460c285a452a6516e3bfc8cbe3f78b7ccfcd1c166
font_01_sfnt_off0001082d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001203f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203F 16604 bytes
SHA-256: 26dc42f1dbd5837541012a6ae34ca273ee0f7a1d7a643419e9966b1889b4d9df

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