Malicious PDF — malware analysis report

Static analysis result for SHA-256 12064dd1ab3fc110…

MALICIOUS

PDF

82.2 KB Created: 2021-08-20 03:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3658bc4b5bfcbd84c61b4ba36af9a8dd SHA-1: 900db7deefb05db3fc33e4032db17feedad23587 SHA-256: 12064dd1ab3fc1100cb7a9c2f01a6ca36827b7ea3af50c843e75cadc71ffe17c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised websites or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/7193023069.pdf In PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021060315485273499.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/f3d47kgt771uoe590l75u40fu6/79404626928.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ef48e8a6fa---kexupalamiwasijerow.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/47192915887.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094aba49b50b---23929248563.pdfIn PDF document text
    • http://mdtrend.hu/files/file/70084170514.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/qbenunnjskcbr1ravh1b5h0pb4/74604366439.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/554ee51fc666271a8b79353d676e1b79/banapupinasikituvuri.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160794acc48452---depusarikejoponimo.pdfIn PDF document text
    • http://architettoannalisatinelli.it/userfiles/files/nadafasajew.pdfIn PDF document text
    • http://gptools.net/userfiles/file/rokepuluja.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/fc4df26a874ceb6d4f6ab66ed4a58379/nafubina.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/70858351097.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/ligurajebisenus.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/14016747588.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/mewokevukagawez.pdfIn PDF document text
    • http://safarang.com/basefile/files/mogifofoda.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24b6e2df24---gujir.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0d8b664ae---86266219192.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/zimadivelufusa.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8966e4460f---62426451281.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/zivujunevil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=articles+worksheets+for+1st+grade+2PDF 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_off0000ddd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD1 16500 bytes
SHA-256: 88080f5fe73f52a8b95fb134f2604a17f24de2afc54e2e4c7f875345a771bf3e
font_01_sfnt_off000108b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CE 10984 bytes
SHA-256: 1f88d703dc8a605b55ad3ea54012f0130872a4c1e87d28dc4edc106a622acab2

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