Malicious PDF — malware analysis report

Static analysis result for SHA-256 712cc9bd59f6de06…

MALICIOUS

PDF

68.6 KB Created: 2021-09-26 14:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 708cbd4d0d367d15fa230be93faa645f SHA-1: b3375476518f709b5378a557bfaeb65c32b69422 SHA-256: 712cc9bd59f6de06cbf0499837d25863e99b811b0c6aab77ecacb81832783f1b
154 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. It contains embedded JavaScript and multiple external URIs, including one that appears to be a redirector with UTM parameters. The document structure suggests it's designed to trick users into clicking a link, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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 1 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.
  • 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://coretry.ru/uplcv?utm_term=android+disable+mms PDF link annotation
    • http://maihome.hu/admin1/file/komupusazajis.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614c445372820---33414323051.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/55240971188.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/nozodutufaxoxujovofojib.pdfIn PDF document text
    • http://theorientgarden.iorderfoods.com/uploads/files/27175920339.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/87545454563.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/gafodotamibubujino.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/7129304285.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109020720301429.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/duramezoguravijodiloz.pdfIn PDF document text
    • http://geosond.pl/userfiles/file/85799420331.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/4741708fd2f645aa3372793116e98ad0/91090576604.pdfIn PDF document text
    • http://52963566.com/upload/file/202109120345541021.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/wigorefemigisugaratetozi.pdfIn PDF document text
    • https://webaruhaz.solar-napkollektor.hu/js/ckfinder/userfiles/files/40571093727.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/83032914002.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/wuzovatud.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/85654532201.pdfIn PDF document text
    • http://starinviter.com/ckimagefiles/51748409691.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/kilakobufowufitufidijiv.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/80020480341.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/jeduwivibideroxijed.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210907_165202.pdfIn PDF document text
    • 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_off0000b12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB12C 14368 bytes
SHA-256: da0b90d576a827bc4a13bfd3b140302ea651dee1aea4de76c7c8d0404d75d79a
font_01_sfnt_off0000d51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED33 10432 bytes
SHA-256: 04136feb891ea073d8d82d3995918a935e83d47dd59161aace0f54a73b46ad18