Malicious PDF — malware analysis report

Static analysis result for SHA-256 61214b26490fdb8e…

MALICIOUS

PDF

77.7 KB Created: 2021-03-27 15:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01678f319289dfc4f2e332e535952daf SHA-1: d52f24dad45218b6c1d29731dedc20cb793dd2ff SHA-256: 61214b26490fdb8ea14567412a71287c060045790663983f333aa29b0ed41c66
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 pointing to disposable domains and potentially malicious hosting, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the nature of the link farm suggests it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/wix?keyword=nba+2k+guide PDF link annotation
    • https://cdn.sqhk.co/vumulevezuf/7jbjehj/79698719484.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/3hihbaX/notepad_compare_files_plugin.pdfIn PDF document text
    • http://pocki.top/how_to_replace_citizen_eco_drive_watch_batteryosamk.pdfIn PDF document text
    • https://lobogisotu.weebly.com/uploads/1/3/4/8/134870795/fezilajirolupos.pdfIn PDF document text
    • http://sukojas.22web.org/guvarurupotatol.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/hjif9hc/stick_fight_the_game_free_download_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/posogamumut/ehg1ifz/rebudekikopuvaxuzafofapu.pdfIn PDF document text
    • https://cdn.sqhk.co/tobijoge/x2hdqgh/20398572464.pdfIn PDF document text
    • https://cdn.sqhk.co/dilobowuz/eP0ExY4/wyvern_ark_id.pdfIn PDF document text
    • http://wineninuxusafu.22web.org/54085735038.pdfIn PDF document text
    • http://devlp.club/983589459843609s.pdfIn PDF document text
    • https://dunopupusegujuz.weebly.com/uploads/1/3/4/3/134348927/7603130.pdfIn PDF document text
    • http://datab.vip/86740131243z12m1.pdfIn PDF document text
    • https://delidenaluno.weebly.com/uploads/1/3/4/4/134438050/zorugo_pizub_bipazejat.pdfIn PDF document text
    • https://bawejitomu.weebly.com/uploads/1/3/1/4/131438353/ab9c1d93f7d3e9.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/jcRifja/xizeretaxosused.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/IifyidM/glory_of_generals_pacific_hd_mod_apk_revdl.pdfIn PDF document text
    • http://badgesverified.com/42838850830uca4g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://807eaacf-9fb6-4e16-bcb8-061395d1d132.filesusr.com/ugd/a3ef2e_c6ab122facb241739b694558d5279254.pdf?index=trueIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_0ecaee1e854348ea901acc1929f23c78.pdf?index=trueIn PDF document text
    • http://xiguporudo.epizy.com/perisabowijavixiledariko.pdfIn PDF document text
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_9e565b8737114ccb80c39349286589c7.pdf?index=trueIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_0e97c740838b46468d6a990700b61eb6.pdf?index=trueIn PDF document text
    • http://potimafekun.epizy.com/lakuwuratolilujeg.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_e6e704f76add4d95ae44745cdff9284c.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF133 4992 bytes
SHA-256: eb445f1a2f9f4ff221de705e02d974e8ce9f215d3bf4301f89f3ee79886b73e5
font_01_sfnt_off0001024e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024E 11192 bytes
SHA-256: fbcff4dcd4a73d97aa774a7e1598e7274a84aa3eefbcd0b05fff5e47a73103ad