Malicious PDF — malware analysis report

Static analysis result for SHA-256 0beadd0e90e4dd8e…

MALICIOUS

PDF

80.3 KB Created: 2021-09-17 06:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c9bd0cdc377082ba7156930332e8cbd8 SHA-1: 547503185f3af89a55969546b3bf26f0ae13abcb SHA-256: 0beadd0e90e4dd8e498f9fbcfb8e05181121b5f298e22027fadcfdc9f7609164
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to potentially compromised websites or disposable hosting. While no scripts were extracted, the presence of numerous links and the ML/ClamAV detections strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://chinazzjx.com/d/files/dosivadolexikogupu.pdf In PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d08734ec2a---54523048954.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/f3bb566686f8fe89b6d908c218d68996/12122360355.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/55643226193.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/savovunepawemiwekarepino.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud/files/walado.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/mikositarog.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/sozapepoxiru.pdfIn PDF document text
    • https://semangkamerah.com/contents/files/8511244059.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/taturar.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/vagotedavogopali.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613d279e1a7d5---45893400351.pdfIn PDF document text
    • http://hide-bo.com/img/tmp/file/67265224923.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/xozodifineselexolef.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/joxovofabusijagujenokili.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/d1942362afc9c1d4067a65728edd89e3/76056653700.pdfIn PDF document text
    • http://rs-entp.com/upload/file/94330085263.pdfIn PDF document text
    • https://technoarc.net/userfiles/file/jalesirudanowozi.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/12158093299.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/nijiregijibi.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/wexujabu.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/80368087155.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+install+wurst+on+macPDF 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_off0000d43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43B 18464 bytes
SHA-256: e0a42996382142eeace92bedf4392ccb76b0c135f4fcdb3d205591e872294b1e
font_01_sfnt_off000103f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C09 10436 bytes
SHA-256: 0db4ffe40ddd36c2946f4286be37c96ed16725ef7d8d22df5ae97704e3edd48f

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