Malicious PDF — malware analysis report

Static analysis result for SHA-256 1055ff2ea9485745…

MALICIOUS

PDF

82.7 KB Created: 2021-07-17 01:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4fbdfd348f24c972df8983cdd48c4ad1 SHA-1: 04d58ba52617124bd8234f5f2308ea99066a3f14 SHA-256: 1055ff2ea94857451f54f9e59e6ad4a9cb283a0d820ff6825710dc4f8075fddf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba58ec6c1e0---31882960558.pdf In PDF document text
    • https://steammining.com/userfiles/file/besuwufur.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/17792799030.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/0p99mh2nmlsu7efmbq3k8sv7bv/82156097276.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/c44ce23db85c1ed0a8a49ccf66e45b89/19099282091.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/rosusevifozararoziwag.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/cc5a77e316fa0c019af758efb2729813/93103430568.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/afaf93bd14b00f3e6ffaea28de702b76/53405736584.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/fenuvanikifekeg.pdfIn PDF document text
    • http://oakgroveschoolheritage.com/clients/b/bc/bc5c94904a1f00f1300372e6f875146f/File/pakikuwakujuvujeponofewiv.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a34bb3966---refokotexud.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0be0be1fd7---95311601928.pdfIn PDF document text
    • https://zulapin.com/calisma2/files/uploads/dowoninedukamikuwital.pdfIn PDF document text
    • http://mutitar.com/user_img/files/kosujalikolojam.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/52920186778.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/59642194306.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609665809baee---jivewidonopozufulata.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/67014447231.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/dsm7mdojjodta7l5d4steltpik/vifijejeg.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/dokozijumitelurabap.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/zunimejolakug.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940281a7e3f---rusixot.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5496009ca6---98406360470.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/92ae51e4f113b9f8c4a8c7e3770108ac/molodo.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/75374335708.pdfIn PDF document text
    • http://camwater.org/media/files/jusudojafagisusefajesadid.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/bomimotalonapefivagumigat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=notarized+statement+of+residencyPDF 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_off0000e0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A8 16268 bytes
SHA-256: e6aaaefb15004d6ce73230f671809f6ccd2cef330f215882d9ca937adefec394
font_01_sfnt_off00010a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A95 10740 bytes
SHA-256: 297b1e9179626a190a06dc462b7ede4b206cfe771a3c968982935b99ed062031
font_02_sfnt_off0001235c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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