Malicious PDF — malware analysis report

Static analysis result for SHA-256 b470c5264527b29b…

MALICIOUS

PDF

70.3 KB Created: 2021-09-25 22:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a52774018aedcf283f242bf1b1382bec SHA-1: d60096d2e3da4086615e0651cc67b4d279d85321 SHA-256: b470c5264527b29b197f296243f756692bd445f3d8cd56374d8c4619df92084c
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://paperland.bg/uploads/file/kutitujuzijifidamerijuw.pdf In PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16125407754.pdfIn PDF document text
    • http://rurisnet.org/images/file/fidugitotilepejuvoresano.pdfIn PDF document text
    • https://trakyasoftavukatwebsitesi.demowebsiteleri.com/upload/files/sasunekini.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/56088085617.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/joponofemiribawana.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403517143c7---1136402576.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/finuguwulosolesuzodadi.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/rajetupemi.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/pudimizupoxutiviwadeba.pdfIn PDF document text
    • https://777mto.org/contents/files/97274457218.pdfIn PDF document text
    • http://oldadmin.k12cart.com/media/files/8856556781.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/78309558254.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/841269573.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/93113207085.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/40991809946.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/d134hit5uneucrrak7f0h19mpo/guruwonenab.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/72195720288.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/15f8ae93a5aba22400201141deca6257/54265847173.pdfIn PDF document text
    • https://shunnasato.com/78041879182.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/s9992et88dstj78vk6r29fssgs/karuzuropefimuf.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/fajiwufogomovokir.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/wuzuxogukodewusav.pdfIn PDF document text
    • https://skopjemuzikon.pmgrecordings.com/ckfinder/userfiles/files/kijoso.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/78466750571.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=surya+namaskar+sanskrit+mantraPDF 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_off0000b138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB138 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94A 16976 bytes
SHA-256: b7177ddde26ccf7ab7ea2158d9a2cf68dea638412bc73a29163890e3425dee0a
font_02_sfnt_off0000f462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF462 10352 bytes
SHA-256: c042ee6878f6efb8a4b66e619762cddc301aa8242ff9de3ac69f2aeca5ec1e7b

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