Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0986ef31e75e488…

MALICIOUS

PDF

84.2 KB Created: 2021-09-17 12:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c4c9d7fe63001a0f89e7c024aa9b0e70 SHA-1: 6c5db337d23061b7714a9b9d3b212ab278d84050 SHA-256: a0986ef31e75e488ed886270064c30a1bde284550851fb19e1f2c994aa0d9582
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, embedding numerous URLs that point to potentially compromised websites or disposable hosting, likely to lure users into downloading malware or engaging in phishing activities. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://huntic.ru/uplcv?utm_term=luckyland+slots+apk+download PDF link annotation
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e98fe852d0---21541250756.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/33294430076.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f708642e1f---35852955725.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/iuc1pskbnpp5igdmf9l8id3m5o/kawixukaxerovoreruvare.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/demijijorivabegizakave.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/xupow.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/66308970728.pdfIn PDF document text
    • https://lideregitimpaketleri.com/calisma2/files/uploads/xezilowanoxavorem.pdfIn PDF document text
    • https://xuanhongkhang.com/upload/files/41075742108.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/7440490280.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/xikevikejufozi.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/tiwuxilozur.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16136aa3200610---valotokakukepabej.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/76372007573.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/meragizil.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/godojivagunigun.pdfIn PDF document text
    • http://www.moyekolodin.com/files/62338778168.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/7725069c08c94159de40c6681a64297c/zanurerage.pdfIn PDF document text
    • https://gerbangkuis.com/contents/files/7785764127.pdfIn PDF document text
    • http://vning.net/filespath/files/20210916082228.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/ropagixexekufekevimif.pdfIn PDF document text
    • http://abnigakgdsg.friendship-match.com/upload/files/tusewesavima.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a767c27316dc4080c495449877ab2354/75324103004.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/nesajajudavevuxan.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/80786680833.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_off0000e1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D9 18660 bytes
SHA-256: 43b34077a55f9ebd062844ccee8569d155364a9b2ab55b406b9dd4161541f1e6
font_01_sfnt_off0001126e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A85 10532 bytes
SHA-256: 39596d7bafc8dec31abc60709cb6a40a4a93c844cc885f4c69d6bfdad75a59ba

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