Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d31e953993d824…

MALICIOUS

PDF

102.6 KB Created: 2021-07-27 05:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f1830353610caefc551d2b830f622ba0 SHA-1: 3c3294dc7bb94d8d7af84ece35ef2478b5e1dc27 SHA-256: 59d31e953993d8248409edba4684a9e207fa03ac38d2101768a71f1ac908a561
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were directly extracted, the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.2104

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607005c48a8e5---zonanavefufuvazavamumutep.pdf PDF link annotation
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d69c7a7ab8---49885054951.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5533715a0---petuso.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/12816728164.pdfIn PDF document text
    • http://tyextractor.com/d/files/31570070522.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f982f2391d---68771024507.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/ukmkvkmhrp3jp9me6dlnl1mbgv/19412031865.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1eb138417---sumirerozidokaropapiko.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b69dd61cd28d625080f2dac3f47c6a0f/5724876867.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/reluxudoradidafiwo.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/40ccd7cd904f09bd136418a739b204f3/zowaluwigibobaxep.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeb1f43007---44060808490.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021062818582473499.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/fekedo.pdfIn PDF document text
    • http://axwelindia.com/uploads/90006709967.pdfIn PDF document text
    • http://meyras-tourisme.com/ressource/site-image/files/tozufagekopowijut.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/nu16e5diouta87uhr0mf1ns987/mewurilulewuxixewo.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708ded533b2---8043333547.pdfIn PDF document text
    • http://ues-rb.ru/themes/ues-rb.ru/files/40468243471.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4843cd36e514fe48c5aac18d69ab5197/sokilutituretufe.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/33047665136.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/s970s7tb1l3ds911d8s0jrod22/nesovotu.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/buxelinikaju.pdfIn PDF document text
    • https://afayl.com/userfiles/file/67312494029.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/02qsjqg5jrtdjcrc6t1c965h02/56055250889.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/siniv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=1000+most+common+verbs+in+english+pdf+downloadPDF link annotation
    • 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_off00011a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A75 16344 bytes
SHA-256: 1719049508062faef8c44179d1ac3c49b4984ceb9a9ee1826888a6c7cf5c701b
font_01_sfnt_off000130df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130DF 2260 bytes
SHA-256: 06a9d1d0c52fe9cdb0d705b1aee55bc06a3e0b8a12259638999d53546e77de65
font_02_sfnt_off00013af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF4 11436 bytes
SHA-256: 9726dd341aa450b18b40f53510dc58fb7dfce0f10681e8be3097340cdf0304d2
font_03_sfnt_off00015562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15562 21160 bytes
SHA-256: d48efce12369f2586dd46947129fa0484f703080ae6be125526b7a932afcc812