Malicious PDF — malware analysis report

Static analysis result for SHA-256 92176ac0d78d303d…

MALICIOUS

PDF

72.0 KB Created: 2021-09-20 15:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fcf37c8f68ccf5d09a57e49b1c775b3c SHA-1: 549fb001c91c4430611a55585964b8418f70e3f7 SHA-256: 92176ac0d78d303d24234c9d85cbc5ff70879d02f2709bd00c155e8db0f3b243
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous domains, many of which appear to be compromised or disposable hosting. The URL 'https://chcial.ru/uplcv?utm_term=wher%27s+my+phone' suggests a phishing attempt related to tracking a phone. No scripts were extracted, but the structure and URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://chcial.ru/uplcv?utm_term=wher%27s+my+phone PDF link annotation
    • http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/nazumobafugosuwozodoto.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132ef1981e8c---mulesisofixibefimagasapi.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/zojavezoluxixamex.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/bakokimakelofatogo.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140dddc59061---kepigisozuxita.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/83788886861.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/21365018641.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/kikijijekufulubupavek.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/fenejixidugiwigopavelev.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/28638739933.pdfIn PDF document text
    • https://camerabentrenet.camerabentre.vn/ckfinder/userfiles/files/dolatijadumidepazoko.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/sulumutizaful.pdfIn PDF document text
    • http://sinostandards.net/upload/files/19811195022.pdfIn PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/lefamomirodopazufa.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/zunawejireravuju.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/bolikuv.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/dewisamaxemukil.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140a73181e3d---74152466254.pdfIn PDF document text
    • http://chieucoingason.vn/files/kakuwiwotodabomisemaripe.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/84475972981.pdfIn PDF document text
    • https://nepaltrekkinginhimalaya.com/assets/userfiles/files/bakorima.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/87564318731.pdfIn PDF document text
    • http://lactopad.com/uploads/files/19915944886.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613043dfa00fd---89889856490.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613755f9a86a9---nutowadinik.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/55966060228.pdfIn PDF document text
    • 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_off0000bc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD446 10260 bytes
SHA-256: 095a22b06df900bb1a3ded2eb9c6d948800a761f025102f171028c105cfa3404
font_02_sfnt_off0000eb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB32 15420 bytes
SHA-256: 6040b12c639d9055f348df06dc7e66e36d1afbdfed74e8b44b95fff426ea900f

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