Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1f4452bac156994…

MALICIOUS

PDF

100.4 KB Created: 2021-07-26 09:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 69d91bd03a3b16c33eae93d9b7d84eb0 SHA-1: 1e132c9b4350df626c326cd8f58d4a91ccf72bd6 SHA-256: a1f4452bac156994684b540fd2b5e3af251ff8ba8f9ec0523ff2763a8e9e0486
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, with numerous embedded URLs pointing to compromised websites, likely to facilitate phishing attacks or further malware distribution. The presence of multiple links on disposable or compromised hosting suggests a coordinated effort to redirect victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lt101shop.com/userfiles/files/62290415266.pdf In PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/138e28cb1f825bf41a33e3955bd0ecf3/zaxoz.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/bceh1ats48f65g31mvoivnoqbg/63267939645.pdfIn PDF document text
    • http://koala-al.com/d/files/wugejudefolorifigixen.pdfIn PDF document text
    • https://adikketiga.com/contents//files/jelobaxaba.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/19b269cc3a1f2c4907b8d9cf11bf843f/71160832193.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/lc007718indttkns3brprff5bg/99845481292.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050523140673499.pdfIn PDF document text
    • https://dptech.vn/uploads/files/66674539009.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/ukmt59dgucj25ttvp8grng3svj/40676026963.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/69oqqnf6lkt9mrnl0257lhnk61/xuwixegisilojisuvevo.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/2987984341.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b61f44e824f---46065868956.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/50cfc1e6bd4e4062724a777e417866e7/79180318359.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/xatuvesagumo.pdfIn PDF document text
    • http://marty-triple-m.ch/inhalt/files/61728840862.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b10743b098c---xitugonazovivafawirozixi.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/36314823261.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/86210687755.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/74857083690.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/xileguzosu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=compare+and+contrast+activities+2nd+gradePDF link annotation
    • 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_off000123ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EA 11028 bytes
SHA-256: 1393f293f9cd2197669ce7e31134225bf5ea51d7e53460c9bcd058a185980ffa
font_01_sfnt_off00013d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15587 17372 bytes
SHA-256: 2ffca76260175b832ef037182598cefd1092f50e120d2edfe13314a4532bc364

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