Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b698ffb90629247…

MALICIOUS

PDF

90.1 KB Created: 2021-08-01 19:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 84033cec1ba2b095fac804334a12a4c9 SHA-1: d437cf04b5d1bce8ca783cfa1dff46e63374df18 SHA-256: 9b698ffb9062924756f2e906d3558c5566214365ad44adb0d15e8c4ef1d91133
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains a link farm pointing to various compromised websites and IP addresses, likely intended to redirect users to download further malicious content. The PDF structure and embedded links suggest an attempt to disguise malicious activity as legitimate content, potentially leading to further infection stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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
  • 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://impex-italia.it/userfiles/files/18940708635.pdf In PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/24266732307.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c14d2e76007---fiwubojezewa.pdfIn PDF document text
    • https://baptistfriends.org/media/77682425860.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/bosikekolo.pdfIn PDF document text
    • https://mytopics.it/uploads/file/54361620324.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a41bba633bc---tazina.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/zoxaturoturezumex.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/f824bb7602ac99757aed1c1022b4bdaa/zivesitavejoni.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/zipipuzovosokuw.pdfIn PDF document text
    • http://anma.pl/anma_edytor/file/pakuzukuvitipope.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/a894f94a661faaf43b5ceb26dd478a26/tuxemana.pdfIn PDF document text
    • https://vestol.bg/files/file/sepinizovoborivopuluj.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4a385a95a0---gulexinedexanivovaxugi.pdfIn PDF document text
    • https://groupunsur2.com/contents//files/wawegafon.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vsscpbga3mel43se17f1i80434/43526675599.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/4fe47c3cf861d65740c8987b9b6df700/guzisapizuvese.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/14797512966.pdfIn PDF document text
    • http://olversonfamilyreunion.org/clients/5/51/51a48c89da211807e19ed56f8a1a1822/File/zavilimodonutifukitusine.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/52e04a0ed579a57e95087c4cda86fd6e/rivokixuzasafavinejisali.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210716_050258.pdfPDF link annotation
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edc8d2b4b55---45864037217.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/patiforajadipemokifafutiw.pdfIn PDF document text
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/momugepifixa.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/nakixokuwufosolakegu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=aws+certified+cloud+practitioner+certification+salaryPDF 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_off0000f8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C4 10892 bytes
SHA-256: b9e4a6a9f08072b192c4f4ada208ac2a5d617795e5901b06284dea515d479c4b
font_01_sfnt_off00011232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11232 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A44 17616 bytes
SHA-256: c6de2b6fe6da4cb0da12d2756c2e384c54741d2b0916987002e55db9a9566844