Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de3a0e1e3b697bc…

MALICIOUS

PDF

117.9 KB Created: 2021-07-05 07:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 38cdf358c14ec1bd3edd3f19c2100bf7 SHA-1: 8f62297a56d53b4afb69fa5bb69f4bfcd50064f7 SHA-256: 9de3a0e1e3b697bc3f3b475bace364884b94892a7284bbfb3fb63175d6ee0ed3
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1d954386d---64511842515.pdf In PDF document text
    • http://swaminarayangm.org/userfiles/file/giximitepebagiwu.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/83524473289.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/1d2a3668d065f556e88e67dc1ecdc023/seponagi.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/4508671839.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/b3jb13gvl825npa0alcoug0f45/sufanizusexi.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/fda038c7e6a77933cc13f1a605636f29/46652371506.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc00b87d03---jotefetowos.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/6d48be1150f7aeed0de53a7270c9079d/pudibemiwanabegodaj.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/e2kbk6v04iaocbhq3uusimr2u6/nasali.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/nikivokejodavuluj.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847abb2d639---tepedowosofe.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/a112dd39d57174849fdbc168ef53df17/64401781056.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/49591366750.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb2a19a4d3---84095314308.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0174b35b39---57132007796.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/f6afa994ae57c807c0cb2e8251586470/94027316508.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d344873e1---lerixiwezomipiso.pdfIn PDF document text
    • http://apsons.eu/files/file/636151311.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/69564019926.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/cl41m065vkv8u27dhk8rku0260/73992491506.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d08168e908---59005146567.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/e2n8pq9me5hp20sigheugiqlq5/45432083995.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/jfheqtk7mmb8qaoshl2kcsg043/zajinodapegipomero.pdfIn PDF document text
    • https://norservis.com/files/files/60655025628.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=cave+story+how+to+get+best+endingPDF 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_off0001697c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1697C 17984 bytes
SHA-256: 8e4ee297b03d48a1dff1e9988ef9203b82e51d8024f14079a186759ab24c49b7
font_01_sfnt_off000198dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198DD 10920 bytes
SHA-256: fbb6311f200e34b6321e8db1c8db7c7da8d93136621c57941ada293d1383dc71
font_02_sfnt_off0001b203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B203 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1