Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fe32d04cd9bbce…

MALICIOUS

PDF

83.1 KB Created: 2021-09-04 16:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d568118e9d734dbbd12b14a30eb244f2 SHA-1: 992ee49d811274d10776bef54a69ef5b0cdd0e38 SHA-256: a1fe32d04cd9bbce87dad6b98a8dd8c4eb2aaad8eb65aff00868d41b614682bb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised WordPress uploads and other disposable hosting sites, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://allytemp.ru/uplcv?utm_term=transaction+services+microstrategy+pdf PDF link annotation
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/jesoxuwegatebixetiloxun.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608205d3542fe---bagebokusipebafoga.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/80966929400.pdfIn PDF document text
    • http://mmt24.ru/files/file/13665949497.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/iae4i3749blkjd4ranlars5us3/57266499798.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/magisipevakutuvutedibife.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/d199ad741f483c8b2ef89977f915efc8/xakaganimobanafu.pdfIn PDF document text
    • https://dm288.com/slicice/file/nidetojenijotila.pdfIn PDF document text
    • https://planningpvedh.nl/ckfinder/userfiles/files/lubuwevedizizanupasurilik.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/janive.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/5308618778.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/afdfd6b6ccd932933bf32c85c7a38ec8/47208572934.pdfIn PDF document text
    • https://www.disbel.es//ckfinder/userfiles/files/63251532896.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/dinajegum.pdfIn PDF document text
    • https://merydian.pl/nowymerydian/userfiles/file/36230544005.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca7da68e38---43572665096.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/41a8f132317688f2eeacf6a01bf32cc0/98040152983.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/81378538785.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/97963393445.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/q89ccnkufvvi4e2r6k2id2f29v/nalamadoxikesutumeteritix.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/pofalefimoxowarutaze.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/c0edab05ffab7f974338c3957141445c/7929352180.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/18104852789.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_off0000da71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF283 18988 bytes
SHA-256: caecd98b1b086e75d87b349b0598b4b97c42561402056c88756d425ab5a1e808
font_02_sfnt_off000124aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AA 11060 bytes
SHA-256: 03bddc04b8538bd2777ef1067e6d90f1809566745cdbc982e37b5df353ada913