Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0b10404e98f1ca…

MALICIOUS

PDF

85.5 KB Created: 2021-09-12 21:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac814b4258d7c24dcd915ee04f523db5 SHA-1: bc5d1855186c2f10df0903f0a303323ba094ff91 SHA-256: 1f0b10404e98f1ca0b76feb2daa91a077d779e16ed23f9a1ebcb13aa3a2e4457
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by multiple heuristics, including ML classification and a specific rule for advance-fee scam lures, indicating a phishing attempt. The document body, though obfuscated, suggests a lure related to prizes or parcels. While no scripts were directly extracted, the PDF structure and associated URLs point towards a malicious document designed to trick users into downloading further malicious content, likely a trojan as indicated by ClamAV.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://grandegroup.net/files/voledefaguzewilaxu.pdf
    • http://ombs.ru/uploads/files/44883423755.pdf
    • http://ngor2-3.com/file_media/file_image/file/58730918447.pdf
    • https://apz-arte.com/ckfinder/userfiles/files/3119195234.pdf
    • https://kabelkyaobuv.sk/editor_uploads/files/wotopiz.pdf
    • http://cuanhomkinhtoanthang.com/media/file/larejelugosokexe.pdf
    • http://getdol.com/page_data/file/77951451990.pdf
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/89944528296.pdf
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/9400274723.pdf
    • http://yossy.biz/userfiles/file/kotivijukiwiji.pdf
    • http://artc-polymers.com/upload/images/files/kozanukolajis.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/213c069a38220e5f431b41ce429cf4cb/51165285335.pdf
    • http://polymer-optix.de/userfiles/file/karajasekegirakelajixe.pdf
    • http://erago.cidees.com/uploads/files/davedunibubu.pdf
    • https://pmrmhss.com/userfiles/file/gakunidubado.pdf
    • https://osakaav.com/userfiles/files/didonowerenakexelatin.pdf
    • http://tangiahoang.vn/Images_upload/files/70086008796.pdf
    • https://www.nitdgp.ac.in/uploads/userfiles/files/71874333081.pdf
    • http://ivankotov.ru/img/lib/file/74978307815.pdf
    • http://kadh.kr/bobod/upload/file/11836085752.pdf
    • http://bright-mineral.com/uploadfile/file/2021090402123052.pdf
    • http://gyermekhaz.hu/Content/site_images/files/46944454744.pdf
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/mefukudebenavajedejugabon.pdf
    • http://viprealestatebrokers.com/userfiles/files/mogenorelijipezolewolagu.pdf
    • https://hse.tw/upload/file/7968134554.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=delete+phone+cache+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea79.bin
7c0aafbf1ff65427dd80fce33fb439a24ba50e6b85ef5b2c64aad3652a8b5b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA79 17620 bytes
font_01_sfnt_off00011895.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11895 16792 bytes
font_02_sfnt_off000130ac.bin
c6a69779801c61ec0b3eb42d90142858742b3ff5daa4efd0c5db8e33444afead		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130AC 10444 bytes

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