Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3323dbebaddf00…

MALICIOUS

PDF

75.5 KB Created: 2021-09-02 05:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 29c4bb2f1409f7aa18398ca0148a1b60 SHA-1: 54f64b9688e9a95a7a255c208e9e821f307ef6de SHA-256: be3323dbebaddf004d093b948e4976d777147935d4cc28c870f3b8388af922a3
176 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Multiple heuristics identified the PDF as a link farm pointing to compromised WordPress sites and disposable hosting, suggesting it's used to distribute further malicious content or phish users. The embedded URLs, including one using a raw IP address, are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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 https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/2dd493fc1efa96d48a9e4f2191869df7/xawizepuxodano.pdf In PDF document text
    • https://carrieres-pierre.com/userfiles/file/64200330738.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/86943876274.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/72603203993.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/78115597182.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/61629524454.pdfIn PDF document text
    • http://jar-ted.pl/file/wosalefudomaxen.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/31477268774.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607302a47d71c---taluru.pdfPDF link annotation
    • http://jiangsutravel.kr/userfiles/files/20210818_150532.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/96185296731.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/83113926678.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094c6d9814e7---97901302737.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/munejudodirulekeviki.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/6dfd137829c23839432e1c9022074e99/22851141272.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/40596887287.pdfIn PDF document text
    • http://inercial.es/uploads/files/kufazafofelu.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e479cd446e---potipozufanafinoxa.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ee2cae819fde8466de3778022b7054d1/66852660687.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/20391204032.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdfd0cd375---lavajobevewexigolozo.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/91820845989.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/11520545872.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db2dfe1ab0---rarawogojozofobilapo.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/9vqqut7t5eb6ngu57aes5fs0g6/kozorovamo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=definition+of+wine+in+the+biblePDF 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_off0000c799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC799 10108 bytes
SHA-256: 96a624f6aed21c54ee0b2413a15f3f07839e97215c74479825c2ac92573ae4b1
font_01_sfnt_off0000de17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF629 16316 bytes
SHA-256: 7481518884e990f70298727805e956c59929981653d50dd686d8c5c2afeecc11