Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bba48448c689b7…

MALICIOUS

PDF

82.4 KB Created: 2021-09-19 06:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 90326019648c46519664d56f1ac5433d SHA-1: 0f354b5d813809478cbfba4f493fbcb4ad3f84a2 SHA-256: 08bba48448c689b74f901f94fe6b014495dfabfb2ec0a3f2c93fce2efc9770ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URIs like 'https://coretry.ru/uplcv?utm_term=pc+remote+apk+pro' further supports this, likely serving as a lure for users to download malicious content or provide sensitive information.

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://coretry.ru/uplcv?utm_term=pc+remote+apk+pro PDF link annotation
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16140de1bb1c6b---66045552032.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/komilesaxabita.pdfIn PDF document text
    • http://xn--lv0az70cxar.tw/uploads/files/202109060834267501.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa586219ba---tikebi.pdfIn PDF document text
    • http://carbontuning.ru/file/vixolenovetipowome.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142ded401a23---72185627193.pdfIn PDF document text
    • https://fluffy-chins.com/images/file/sufozop.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/80647391274.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/46935213318.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161327c80ee7c5---26048314786.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/85144058336.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/00bb557f76d78b1eb57e405e8a6fe631/lurapiximujovegapamigo.pdfIn PDF document text
    • https://chv.vn/userfiles/file/dilulidanejemifozive.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/18569703618.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/44281657900.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/75057531659.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/88241235442.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/xaxix.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/titiwobobusutalukefewopek.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613387bc49cf8---nasidirulutadole.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613299c8bca65---sobikariguvidelidinejozu.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/gososafavodajul.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/6631345806.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/16728325562.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/14610057739.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_off0000dc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42A 10220 bytes
SHA-256: cf689bb2e9b16300c63021a906a9f6c03ef05e1d8f273fce2244464b9d29c4e0
font_02_sfnt_off00010b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B28 18532 bytes
SHA-256: 13615e5bb84e413910e41e798de7f9b381f28a016443281ba8efa6ae046264e1

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