Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe073bad84b4eae…

MALICIOUS

PDF

77.7 KB Created: 2021-08-16 15:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: c39f1cfa838f585cf9ce85e0e5515c13 SHA-1: 7fc9cea85abf571e73d8cb37f55a0fb1b7828356 SHA-256: afe073bad84b4eaefc474384c63b0a423aef4056b8f9aef5df661b3cc3fc43f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. Analysis reveals it functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/f2aa9da1c5aa3068c8f82f4f8fe52eec/57372695224.pdf In PDF document text
    • http://krukewittfarms.com/userfiles/file/13667443316.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/lagalub.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/tifigasetawemor.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/ea9259a9094d2e3a4fd9c151a41cd05e/67366935612.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/jinifosowosimofuvak.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/67011796222.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/a4e2f21a2c6ec849db67a3ab150336d1/6170873519.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/gososuluwemomopemamanune.pdfIn PDF document text
    • https://wecareprogram.org/images/file/19925059167.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076ba700c1f9---zuterelupugezexodidiben.pdfIn PDF document text
    • http://firegallery.ru/img/upload/66852104868.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858be769282---70621010132.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/jawatopoxatufoxalirelej.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/42f5c59a826a83a53479d8d93e302c63/fudujivupaviraw.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608401927fef3---sopafab.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848d681427f---49002671448.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/ritojo.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/60d0f91c6884cd0c5b11c34a946fee9b/40647034519.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/telubumidezuna.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/csc1sgjptpc4usdth5r7ekq66k/tumupulowudanukij.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/890a06d51c0c25cad1a372dccc1f2b40/jarubofoxuxabajeg.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608789e74b858---16382934272.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e1843d8f716---89947872717.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+use+sewkeyse+knit+stay+tapePDF 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_off0000cdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C0 16528 bytes
SHA-256: 81aae383556747483989bb2a8adfebd3909cfb264bfb5cecf3dcebdf62221ad4
font_02_sfnt_off0001105d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105D 10480 bytes
SHA-256: c48aaf6faec338a627fb2e34f08a6b94837299e83c33a21135af5d927ffeb943

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