Malicious PDF — malware analysis report

Static analysis result for SHA-256 754327cf44833181…

MALICIOUS

PDF

79.4 KB Created: 2021-09-20 00:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f2722f5bcda0153d936edce72b150a47 SHA-1: 9249d8959b15f7bf9a6dbc0279aa9efc320f60ab SHA-256: 754327cf44833181cd1b32f99b5ec99786534f0711ec82a962170db9c6e413f0
164 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URLs, including links to compromised CMS uploads and disposable hosting, suggests a phishing or malware distribution scheme. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the idea that the document attempts to trick users into downloading content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=unblocked+pirate+bays+games PDF link annotation
    • http://cx-gl.hu/images/files/sanexakitovirimofut.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/63567348360.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/54972208488.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/6212873882.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/161405b49e598d---tezunosuxagowefifajepe.pdfIn PDF document text
    • http://elma1.ru/!upload/files/84150391545.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/09/202109041325307320.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/67833054254.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/vifegurevumim.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/jubuxufafusasuvezibexotus.pdfIn PDF document text
    • http://telektrans.hu/editor_up/86604542155.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///fuwajiminizusufos.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/54928421184.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/jupij.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/makagitabegiduniro.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/kamokaxobexakobupoloditi.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/c004c8e3f6d9e9576983cc1c943b82a7/81342521191.pdfIn PDF document text
    • http://oembag.com/uploads/files/202109091233553576.pdfIn PDF document text
    • http://belovosushi.ru/files/kokaroj.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/856ce3e39984900b39f5e95916bec6cd/mifesofolamegenaxevepemob.pdfIn PDF document text
    • http://word.mn/uploads/assets/xavuberuxopobumikulib.pdfIn PDF document text
    • http://wx-bm.cn/upload/ckimg/files/202109200510319079.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/92738636993.pdfIn PDF document text
    • http://harlit.com/upfiles/file/52965605477In 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_off0000d1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C0 11212 bytes
SHA-256: 50e4db65d4a6111591870460532f11c49b013e58ee580b1a88f67f0d6762aef1
font_01_sfnt_off0000eb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB93 17244 bytes
SHA-256: af831fa839f4e47147027c18b124a53959933d47c0d7c8aa91358caf8abc093e
font_02_sfnt_off00011805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11805 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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