Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ea31dfb21ab4b2…

MALICIOUS

PDF

152.1 KB Created: 2021-03-10 19:22:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e0008f117acea3d71ee8af62f2e68164 SHA-1: 6c0de6e22d1352ad655830d19acab6469522cf90 SHA-256: 34ea31dfb21ab4b2da518e4669f40fc52703de0f2db59cf9352e0e27d77beb51
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/award?keyword=learn+amharic+alphabet+pdf PDF link annotation
    • https://cdn.sqhk.co/pebekaja/igexAG0/34349404625.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/ebgfjf6/72336153332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490539/normal_60219b877f18b.pdfIn PDF document text
    • https://cdn.sqhk.co/lenubire/jgjbgYK/ice_cream_cake_roll_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedijudibo/aPohfeg/11904887671.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476930/normal_5ff59fe9098e7.pdfIn PDF document text
    • https://cdn.sqhk.co/dubibuwa/Mhi8K8t/gevarufemozalurad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379048/normal_601c989360ddc.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/wumaw.pdfIn PDF document text
    • http://wigobike.sportsontheweb.net/bakegeketuvogilidovirizag.pdfIn PDF document text
    • http://gazajujana.mygamesonline.org/70528678180.pdfIn PDF document text
    • http://wigoduxaru.22web.org/facebook_dark_mode_apk_free.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/2ggtibr/43605280631.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/cinder_elly_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wolobugoxew.myartsonline.com/how_long_is_catching_fire_movie.pdfIn PDF document text
    • http://nununad.myartsonline.com/litipazisateruferuv.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/examples_of_probability_in_statistics.pdfIn PDF document text
    • http://xonifovozub.epizy.com/86566820843.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00010e51.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10E51 86572 bytes
SHA-256: 23ad98c38cbbb4b2f12945d204e108c086165212865ee031daa434540ad96aa5
font_01_sfnt_off0001dd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD62 4976 bytes
SHA-256: ac0a10ed47dce86d2c4b06894c416a1144fa94e598afc61f3a1fc3012a2e1e79
font_02_sfnt_off0001edfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EDFD 3312 bytes
SHA-256: ac6f16138e8cd6cb20aaf38042101056363dbfd93ff6d924dea07a9ef06f6b85
font_03_sfnt_off0001fb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FB73 13332 bytes
SHA-256: 145a751ff801699b27b1959f9434462a716b7183e2df2c7cef85baffb704260c
font_04_sfnt_off0002249e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2249E 16404 bytes
SHA-256: a0d621882a19daa81fc65faa52db3dc28482abac87b3eb18586b6a136304c26c
font_05_sfnt_off00023a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23A66 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
font_06_sfnt_off0002481a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2481A 1736 bytes
SHA-256: 1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19