Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f15252f2e57659…

MALICIOUS

PDF

70.1 KB Created: 2021-09-01 00:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 908ad50e19127a7e4d5090979745a2ad SHA-1: d4aa4b1e7761f2de40296d4761779ae66c0cca7d SHA-256: e8f15252f2e576597113deed9585b4a481b280d8568d04eab31d4639cd662f28
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and is structured as an image-only document with a clickable element, a common phishing lure. It also features a link farm pointing to compromised CMS upload storage, suggesting an attempt to host malicious content or redirect users to phishing sites. The presence of embedded JavaScript indicates potential for further malicious actions, such as downloading additional payloads or exploiting browser vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/91ac2e18a4bfc5260ffe42fa09e96ee1/60331845905.pdf In PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160afc2aad3b05---bipabarabuxe.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/14309083563.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/kitegezenikinenu.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/38520906308.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/85946676355.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/8aq1h5goug79qqjebdu6p6uko7/nuxuwozuwoxak.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/mujagegurowinigemexiraxu.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/70158859254.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/c8943dab14b882e0ec2c818500b17492/bugigutomil.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/pikopupepisabuzanawufad.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/kuzupakalewukasegixaxosax.pdfIn PDF document text
    • http://renovator.cz/files/file/69298839856.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f00498b7ffb---68421115584.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/96814361924.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/63095543545.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/80383980786.pdfIn PDF document text
    • http://hujiangsy.com/upload/files/41337288614.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/bscu4fauuumtn08mgblkm50pq3/vutipize.pdfIn PDF document text
    • https://sambelteri.com/contents/files/54242326241.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/sexezodi.pdfIn PDF document text
    • https://storycycle.com/ckfinder/userfiles/files/wamepaj.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/9fd45eff68372df1fbc2e1436c81ad16/68252898863.pdfIn PDF document text
    • https://oversaslogistica.it/file/xifufolinazimaronupefu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=what+is+the+limiting+reagent+in+aspirin+synthesisPDF 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_off0000b702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB702 10688 bytes
SHA-256: ba37375e64886dea9814bb66d947f4743fcf05d622df53cf894850a0dfd41b52
font_01_sfnt_off0000cf4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4F 13896 bytes
SHA-256: 6768a4815f1ed11372408d96e86bc11e0afe3458781b7e9267d5f52f0ef9fe4b
font_02_sfnt_off0000f14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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