Malicious PDF — malware analysis report

Static analysis result for SHA-256 34732f822c5604e8…

MALICIOUS

PDF

70.0 KB Created: 2021-09-27 11:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 050a1e77951b5e71799ee99affeb51d4 SHA-1: 0bb678c0983f5e41fa50fd68514074959ac26be9 SHA-256: 34732f822c5604e8cdbdfa5b2285f8621fc310e073b14439f14cf5bae7448883
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, forming a link farm likely intended to redirect users to malicious content. The document body is unreadable, but the heuristics strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • 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.
  • 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://catamma.ru/uplcv?utm_term=best+package+tracking+app+android PDF link annotation
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/74229530403.pdfIn PDF document text
    • https://sibirprokat.ru/ckfinder/userfiles/files/5384119065.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28261883898.pdfIn PDF document text
    • http://helices-evra.com/userfiles/file/72917670784.pdfIn PDF document text
    • https://htijsr.com/userfiles/file/vigarisunomisan.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/75727579959.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1614fe6eac70a5---lajilofexorovekuz.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/mufinuluduxare.pdfIn PDF document text
    • http://meuseguro.top/fotosempresa/files/bufinilav.pdfIn PDF document text
    • http://kastely-vacduka.hu/fileok/file/nasase.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/9bfddc1b6b06930f0071d94801a4b735/84472660631.pdfIn PDF document text
    • http://eegbiofeedback-leszno.pl/userfiles/file/pomapimunubitoni.pdfIn PDF document text
    • https://salwangurugram.com/files/5528891994.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/4492abfe7db1357f55d25576420984d3/82039606158.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/tunekolapufe.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/vugajok.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/39511565887.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/14107102589.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/63539378815.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/92551403807.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210927_122140_3578.pdfIn PDF document text
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/63603977360.pdfIn PDF document text
    • http://xn--2e0b30g3uq7pay7m.com/upload/fckeditor/file/49508998880.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/39307318087.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_off0000af6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6C 10788 bytes
SHA-256: cb0033f8dfdb050c4d63e9b8db8d5eaaab5bbadc83666813da6373763cb05cab
font_01_sfnt_off0000c843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC843 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE055 15884 bytes
SHA-256: b1c2c30c8ce81452403228330777803c688f6d92e1bea37631984ba7e609b78f

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