Malicious PDF — malware analysis report

Static analysis result for SHA-256 617cd230497efb4b…

MALICIOUS

PDF

80.9 KB Created: 2021-02-27 17:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fb869901bdbabced49915a07ca1a4b01 SHA-1: d96362381841df679c51e8d93f51c932d2f095f0 SHA-256: 617cd230497efb4b2f96774c34a70982619de2834759c4071349b2d795207592
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to drive traffic. The primary heuristic firings indicate a PDF SEO link farm and a ML classifier flagging it as malicious. While no scripts were extracted, the presence of numerous external URLs, including one pointing to a 'mod apk', indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=warship+battle+2.6+2+mod+apk+unlimited+gold PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496381/normal_60258fa612fe7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414848/normal_5ff2b225981bc.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/bhg1jao/balloon_arches_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/LAyij5Q/nolutotaranaloti.pdfIn PDF document text
    • https://tosoremekik.weebly.com/uploads/1/3/4/7/134771766/143fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491426/normal_5fd8b354c7074.pdfIn PDF document text
    • http://sijazoge.iblogger.org/fubej.pdfIn PDF document text
    • https://cdn.sqhk.co/jukunobegabe/if8id8E/mulokabuwifu.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/0gdifgf/wexakimuxawimugizikogema.pdfIn PDF document text
    • https://kegozogoro.weebly.com/uploads/1/3/4/5/134525602/3719837.pdfIn PDF document text
    • https://tekebuzegox.weebly.com/uploads/1/3/0/8/130814382/bagetol_zajed_xizimudugapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_6010d4293d00d.pdfIn PDF document text
    • https://cdn.sqhk.co/sepagumal/jaapjal/infinite_dividend_growth_model.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pidodexogejax.myartsonline.com/35676857564.pdfIn PDF document text
    • http://tonezifimoraga.epizy.com/41596536857.pdfIn PDF document text
    • http://nifopufu.epizy.com/android_1_mod_apk_kick_the_buddy.pdfIn PDF document text
    • http://pegalisijeg.epizy.com/49356971642.pdfIn PDF document text
    • http://gimukukuzape.epizy.com/auchterarder_high_school_uniform.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE799 5908 bytes
SHA-256: bb286cdd837173ecacff7fda5a26c2deb010a710c100dab81d192d6eafde6de8
font_01_sfnt_off0000fb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9D 10016 bytes
SHA-256: e01b8fdacbe08f5288bdaf6f46989edf73de68691c2fdeec3df4976c502f1b53
font_02_sfnt_off00011e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E32 16680 bytes
SHA-256: 76b5696f6645a1c0721d87caa1f1f1d755407131db89cf974e68043318ffbeaf

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