Malicious PDF — malware analysis report

Static analysis result for SHA-256 31d9b62bab808e9b…

MALICIOUS

PDF

91.3 KB Created: 2021-06-28 05:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86c6d5ee24695388dc631d1126326c72 SHA-1: be4d59c7c5406aeea69c624fe1ff5e72d777243f SHA-256: 31d9b62bab808e9b9100c7be91a739538c5fefecfd574e95693fad2d1e927c6c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised or disposable hosting sites. The primary purpose appears to be directing users to potentially harmful content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://aite-materials.com/upfiles/file/podatile.pdf
    • http://119hero.kr/userData/board/file/gigoxejenorixutetox.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac0409cb7a---48713395982.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf94503ba11---37699584277.pdf
    • http://jingluo.net/uploadfiles/files/madaputasu.pdf
    • http://agnieszkapawlik.com/userfiles/file/ganoxebujafisenuleweguv.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab32ea2fc11---wexozinezanew.pdf
    • http://maybomchuachay24h.com/Images_upload/files/jebatazibofowazam.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/1nl9668h2ndqv6i9glt8gkkd60/13243067225.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc92475477---17369977321.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090993f7f65d---3310383763.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84242624a---wezevebojuk.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/9571c910f7af7a69d08159061ba230c3/61399871518.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609af893cd38c---35379862506.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4a3fc9468---nozejonenib.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/8uelun4ibt7e4utfllrmth8q74/nopenupukabud.pdf
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14350802642.pdf
    • http://kochamsushi.pl/UserFiles/file/63237512226.pdf
    • http://rideabikenews.com/user_img/files/32513329123.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1c4b59135---sidekivumufi.pdf
    • http://gostinica-domodedovo.ru/files/gijopa.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/30c233122605af5f5be381a18941eddd/zezokogosamodajara.pdf
    • http://daisytalavera.com/userfiles/files/dapip.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/651a52c0896c78ca6326a22bdb069f6e/bijogafiroxekupenixo.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/56d55mtij2orp5gnvhdmq0fq89/45335542212.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=destiny+2+how+to+get+shaders
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x100BD 16792 bytes
font_01_sfnt_off000118cf.bin
c4259a85220d01c6e909d254e0c690e7645456e02ba624538e57a3d36f4e2703
pdf-font-stream PDF embedded font (sfnt) at offset 0x118CF 17884 bytes
font_02_sfnt_off00014717.bin
051a5663bc5214c8d959a104396698f0d75ef075e4006a27bb107c443c3e1432
pdf-font-stream PDF embedded font (sfnt) at offset 0x14717 10800 bytes