Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1125a4170d63dbe…

MALICIOUS

PDF

83.7 KB Created: 2021-05-25 11:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4ab09d35999b81597c852fe01b0db99a SHA-1: a21d02d47876ce822e24866e598f6183bf68eb0b SHA-256: d1125a4170d63dbef805dc737fd871ee57a7e6fde61a1a85541739e48a9f8204
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd8b1a2a50---61137499206.pdf In PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/b49d3acb8f60637e598629d7367f0bd8/gosokusavadewo.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/844d130cf6084672eb7487ad9b135269/52631210520.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a93ad105062---xubezibetoribufatigugivif.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/stklroa6cbgq3o4hf1thirrvhm/31534386987.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/r4f227ft2qqq76ip32e69534r6/68727892158.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/b8e54f547edc619dd8451887f55ba0c6/97266515040.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/1bobcg0eggjag216527jii5e9h/mimiwutake.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/edfb1dbbed7bbf1349d6bbe598a42988/majagozej.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/e9175a5932ccb9de36898257967519db/52454798810.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb312517e4---76487934283.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070620194d8a---vakafiwaze.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/2vq8eudavueq9p4nivojlt1d52/10609865632.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/suvedesunesag.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608000873d273---87183083008.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/l54dpdt8so5hj5j926g6mmci8o/diwukadibedixalevev.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/74779277977.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba3b9bc4cd---tuvijijufobebezedisogom.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f2c64990e---27517208738.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=meluha+hindi+pdf+downloadPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE5 3160 bytes
SHA-256: b839e7bff23983ac3f72da8c57ae0c983c0dc27991f7e3593f1245139a590f6b
font_01_sfnt_off0000eb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB36 4952 bytes
SHA-256: e14ab7972664e6f55b6e20dc22432cc6ffcc25785fd117988d8d139ec30f7396
font_02_sfnt_off0000fc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC29 10452 bytes
SHA-256: 16888778893411e50f370ae61bf2d7cde031dde46bf0caf123bf426be09ddd85
font_03_sfnt_off0001202c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202C 16060 bytes
SHA-256: 74c25351ceab73455d1891ea470fad3788f7d91d7dd2aa15ed54b0feca07d747
font_04_sfnt_off000134f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F7 2892 bytes
SHA-256: 30a6a651756e9bf2d6d9deb8af079c0916d23a7bebd7fdedf46b9e975a6411eb

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