Malicious PDF — malware analysis report

Static analysis result for SHA-256 174b972d55d6ad2c…

MALICIOUS

PDF

84.0 KB Created: 2021-09-01 07:34:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5ab9a8b2d836284544826680588c1c08 SHA-1: 601f490c8fdb33d5e617542708c222e50b8d6393 SHA-256: 174b972d55d6ad2ca07a1375c3c7fc83a6685b6afcdb5a9bb28d8b983f217624
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links point towards an attempt to redirect users to malicious content hosted on compromised CMS platforms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/jca1e0i2coar4sjdqh8959eafd/88828798138.pdf In PDF document text
    • http://ps-chiptuning.hu/userfiles/files/terujixobezugojirot.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ff164f601---rorunafunubisurabofemopuw.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a560642c7fc---14030998508.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/vezekazodopur.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbc55a5a09a---jaxor.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/12575290662.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/97423786593.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/47346879991.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090f120515c5---46425811288.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160750908c6295---83874793917.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/tatobomowupe.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/loragopeda.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785fd7e323a---rafuwi.pdfIn PDF document text
    • https://digiconelectronics.com/media/togagatos.pdfIn PDF document text
    • http://health-bridge.in/upload/file/13781873304.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/temeduvosezeluwakobewexem.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/xelapezuwisisenivelij.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/73182230033.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/35ca132c6ad115bad2597a9afe580d0c/74186604099.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/52845642824.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/6441d462848945745a4ce83f10f13980/figurorexiga.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/tofisedirovurizip.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/mutikuwelewuj.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/zilisutexo.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/3670d5c240a35b2b0b57cb096cf1695e/66266790430.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=5th+grade+math+goals+and+objectivesPDF 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_off0000e1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BE 17544 bytes
SHA-256: 63fa4988b8529a008acb544f4883f211d7305665b868b206f1f5e6ca2cde53dc
font_01_sfnt_off00010eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C8 11192 bytes
SHA-256: f796eb8c8cbe2153e4ea3d7ea222eac36ae4174329ebf71f25ae1b31c14474fe

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