Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7e92b4e2f1b6de…

MALICIOUS

PDF

68.1 KB Created: 2021-09-24 12:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bf962de563636ab6c14a5c31a28530bd SHA-1: c542668bccf66f14100859d86e833112f1aec9d7 SHA-256: 7d7e92b4e2f1b6dece80df0a44afb40bc716d6ba329ec63784cbf2ca31c7249a
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristic 'PDF_IMAGE_LURE' indicates it's an image-only document designed to trick users into clicking a link, likely to a malicious site. The presence of numerous external URIs, many hosted on disposable domains, further supports this phishing pretext. No scripts were extracted, but the document's structure and external links suggest it's part of a campaign to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://oa30us.com/userfiles/file/zunazabalikowoxuje.pdf In PDF document text
    • https://mamap.in/ci/userfiles/files/74296540717.pdfIn PDF document text
    • http://camonetinternational.com/files/file/19128515657.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/23808588262.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/16859631348.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/bofezixezuwinirenuzatobid.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/69298790134.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/161354b9100f41---69735898180.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/92983604621.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/50568519536.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/67235007244.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/misosarilufoxojivepuweta.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/05914ec1bbca55751810d155905196a8/72595446669.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/simuputabadudo.pdfIn PDF document text
    • https://euchebnici.com/img/file/dotumimesopasi.pdfIn PDF document text
    • https://luckyfood.itweald.com/uploads/files/61400ab5eff17.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210907155028.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/wagekomepaluvapimuxujega.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/58494158732.pdfIn PDF document text
    • https://videoeffect.ir/data/file/98955653215.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+can+i+connect+my+android+phone+to+my+laptopPDF 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_off0000adaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADAA 14440 bytes
SHA-256: 7f67b2c24154ed5189b0f6012601f205212fea1903853cb54718f2f21a81d6cf
font_01_sfnt_off0000d19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B3 10804 bytes
SHA-256: b7f3cc1f62457797467a132f0064e3e771a7ac4285f027145813374c17810af6