Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d2fa9437337ee6…

MALICIOUS

PDF

74.4 KB Created: 2021-09-01 22:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 480a927456506eddcf4516cab69ab06d SHA-1: e814c016bdba139e0827f0be75e8daf2b068e9fc SHA-256: 57d2fa9437337ee63009d4e09130bfaa00a6493e09b188bd4906fb94758e358e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and other domains, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://irlanc.ru/uplcv?utm_term=opacified+mastoid+air+cells PDF link annotation
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983fc98ea01---3377844534.pdfIn PDF document text
    • http://lws-realestate.com/userfiles/files/9197080782.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/bevepipitojosilowaneb.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/84273173883.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160b88eb631ba0---20999831677.pdfIn PDF document text
    • http://fields-on-earth.com/923613857.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2ecee3f35---67185797193.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/79703427029.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160c38b9b4e375---49369767282.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607426dabfece---vepikuvem.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/46325356044.pdfIn PDF document text
    • http://bougerpourstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/fenokeboni.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16079bd39b659c---ravonimisini.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/44965496417.pdfIn PDF document text
    • http://mastersequipments.com/ckfinder/userfiles/files/6804522022.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd068bbb76---lelinakagewobuxowupa.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610458d22724c---mopixilala.pdfIn PDF document text
    • https://airbays.com/userfiles/file/rokigexoju.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210708_B33CAA2992245EF6.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/jolimowiborivigipejim.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740ba591db0---tezisokifumujisil.pdfIn PDF document text
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/radudiko.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e04d94aac---zokenobirifugo.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/91416194482.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121a23edfd28---23859622672.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_off0000c12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC12D 15740 bytes
SHA-256: 94aacce5641eef046b377f381fb696c02e040c5ab2f16a53f36ee3f8a74e4b55
font_01_sfnt_off0000e959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE959 10704 bytes
SHA-256: 46838c501e3fb98a48be9c562138bbaa45caab892cf00c06d332fae5aad494b3
font_02_sfnt_off000101fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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