Malicious PDF — malware analysis report

Static analysis result for SHA-256 d008bb790ef4476f…

MALICIOUS

PDF

78.2 KB Created: 2021-06-03 19:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3454f09dd2fdfb3dcbbc7bb0b0600f48 SHA-1: 70584866ac9026f9a2d99accb51e289297a18550 SHA-256: d008bb790ef4476f546c0ce17e2187410ec8b527e52e3381ca920dff678256bf
252 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a direct link to a ZIP archive, identified as a payload by multiple heuristics and ClamAV. The document also features a link farm, likely intended to obscure the malicious payload's true nature. The primary malicious URL is https://crewmak.ru/pbw?utm_term=dragon+ball+super+v3+mugen+by+trafalgarlawzz.zip, which is likely a downloader for a malicious executable disguised as a game file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 points directly to executable/archive payload critical PDF_DIRECT_PAYLOAD_LINK
    PDF contains a clickable HTTP(S) URI whose path ends in an executable, script, shortcut, disk image, or archive extension. Documents can legitimately link to installers, so this is a high-risk delivery indicator rather than a standalone exploit fingerprint.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/pbw?utm_term=dragon+ball+super+v3+mugen+by+trafalgarlawzz.zip In PDF document text
    • https://bakofusu.weebly.com/uploads/1/3/2/3/132303024/sorekim-xirizi-zejozofalefemi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387241/normal_6010c09562e9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421350/normal_601a641cd0626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426677/normal_606cccca7a168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_6055468c5985b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412908/normal_6006b0f0290e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412894/normal_6053829f5ae2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383450/normal_606a1febcfa20.pdfIn PDF document text
    • https://piwoviwilo.weebly.com/uploads/1/3/4/3/134386066/c3139f5c.pdfIn PDF document text
    • https://wujiwugamibi.weebly.com/uploads/1/3/1/3/131398142/4756718afa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451575/normal_604ca3d940b36.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/bigivagad-gomelalolemefir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388416/normal_6031af1164d40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead48a74-19d8-44ef-8bff-3eaaa296981a/what_does_the_bible_say_about_knowing_gods_word.pdfIn PDF document text
    • http://rixepal.pbworks.com/w/file/fetch/144493473/85595317427.pdfIn PDF document text
    • http://funinupun.pbworks.com/f/extreme_landings_pro_pc_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70512574-91db-4dea-8aaf-b16b3e6cabd4/bissell_1383c_manual.pdfIn PDF document text
    • http://sisagexal.pbworks.com/w/file/fetch/144529764/dabotelukuwusawemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e47c02-34bd-45d2-b221-5be77e73f6c2/7833215610.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_off0000cb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3F 3392 bytes
SHA-256: 0d19bb43ee928a5ac18ba4ca5807bdeb634c936e9d2c856be73e0ba7736985ae
font_01_sfnt_off0000d74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74E 5860 bytes
SHA-256: 3116c62448629ec0ec1cf5a3148d1a2f5693d2c3b022b0bd9751e05ffc50deb9
font_02_sfnt_off0000eb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB59 14192 bytes
SHA-256: baf63ffe2cfb5d756a97909e40bdff2151f9d9718b6cd90e0498fc2e58515720
font_03_sfnt_off000114be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BE 16276 bytes
SHA-256: 366e5f8c524df37cd19a0b61f0260ac72b868ae500b22a352d4bf935f1e4e019