Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b61b9609add08e…

MALICIOUS

PDF

92.8 KB Created: 2021-08-30 20:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4a8919560ac122d1789f53e08289c94c SHA-1: 276cb1bbc03886d3411ebe732fab4b6c200cc8b4 SHA-256: c0b61b9609add08e0f2fbf36c5254ec55e10a8f59fd72e2c64ad3a2766671874
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://nomylo.ru/uplcv?utm_term=love+you+baby+and+if+it%27s+quite+alright+i+need+you+baby PDF link annotation
    • http://skupka23.ru/upload/m/rovikuzezij.pdfIn PDF document text
    • http://ezstreetautosales.com/clients/876244/File/74397129497.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/b57dd8addfaedc5a1cf1b53f91e043b4/41611444022.pdfIn PDF document text
    • https://cesiedizioni.com/userfiles/file/75090888306.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610361d582f50---fitomabusa.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d15f476996---nenijuwenozukelupunegezaw.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/puduxavugigunolamim.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607496c9b0de6---mujarikewejuj.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160b14ee0798ba---42117116281.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/bb6a91e968242acc75e1c9882d2d8cd8/kulabegawunetedevuxid.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/pofabekomajonofobeberal.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/35936203704.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/301622233813.pdfIn PDF document text
    • http://ping-property.com/user_img/files/tazefaxoxobogixomariz.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/mo3fnobpp1phddeqsip3s6li1u/78201949780.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb9826e402---3692978101.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/bakixusewopuroxir.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/73062256328.pdfIn PDF document text
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/22615546638.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/pawamitemani.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/sedefuveza.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/bujizigififup.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/71710449226.pdfIn PDF document text
    • https://xn--mgbaf4adbs1bd2i.net/upload/ckfinder/files/73053974300.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/89477961761.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off000145f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x145F9 18588 bytes
SHA-256: a484a225b837723f55bdb17603ae11b0851fe1200f7192a1b4740bab3abd2893
font_00_sfnt_off0000e635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE635 18132 bytes
SHA-256: 22a9f7ac955eb8351567c964a518a74766d8172502796037e354da95148a3de3
font_01_sfnt_off00011436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11436 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4D 11192 bytes
SHA-256: a2cbcd89d11cd865e2e8f1b9117747794445bb9b2312cb58018e30bec0dfa870

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