Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7054702a2d15a34…

MALICIOUS

PDF

82.8 KB Created: 2021-03-06 07:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 94511c7ad11e73f53f0680c63e5de2ff SHA-1: fef4c58d4d40afd9a48a71411bcbf448942c1d31 SHA-256: d7054702a2d15a345599288e42093faefcfd8e01bc9184885f6e2ad26b723fd9
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains references to 'Subway nutrition information' and 'wkhtmltopdf', indicating a potential lure to external content. No scripts were extracted, but the presence of multiple external links and the overall heuristic profile strongly suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=subway+nutrition+information+protein+bowl PDF link annotation
    • https://katibaluzopoxu.weebly.com/uploads/1/3/0/7/130738884/forasidazabufi_lirerepunug_busivaxajame_fofaduvikomeruz.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/gawirejot.pdfIn PDF document text
    • http://monongzhlh.space/pensum_agrimensura_uasd37q07.pdfIn PDF document text
    • https://dexigator.weebly.com/uploads/1/3/6/0/136049715/7448148.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/96255327091.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/jYGiiie/warpath_pizza_round_rock_texas.pdfIn PDF document text
    • https://latoratepowubum.weebly.com/uploads/1/3/4/7/134713938/e978c4.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/egdX4jb/vofetazukofada.pdfIn PDF document text
    • http://ecosbor.net/english_speaking_app_free_for_pcbat6s.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/b7ugijc/golf_battle_game_mod_apk.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/3901785.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/lm358_op_amp_datasheetkj4a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450337/normal_6002c7d177e67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_5fd1cc96749d2.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxogafu/iajhMQR/mizupotukazo.pdfIn PDF document text
    • https://midejewafefo.weebly.com/uploads/1/3/4/0/134000268/winusawafux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fd2674ff2857.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/vba_excel_formular1c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juborekif.atwebpages.com/food_safety_tips_for_leftovers.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/hardest_maze_game_ever_online.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/mississippi_intermediate_drivers_license_requirements.pdfIn PDF document text
    • http://merapenerabari.myartsonline.com/18734516000.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://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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EC 2940 bytes
SHA-256: 5205dc029b2d4b0ae44ddd8c96d056e1801b9f6b3c115db4e44038fa36e83b83
font_01_sfnt_off0000ee78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE78 5304 bytes
SHA-256: 4d18a8af6a83ad7612bee76980fe331b451c5bac26bd5c1ebd78bccb7dfbaab7
font_02_sfnt_off00010088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10088 10800 bytes
SHA-256: c016ba1f3abd09b936e4b78f8b7c36cbbf70408ccc61d929180cd0fb3a201dba
font_03_sfnt_off000125c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C7 16296 bytes
SHA-256: f18bbeb39ce0ec1069eeb9033ef9d17f1cf20ced6faa2b20464ee46a840cf745