Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23744363d0fd488…

MALICIOUS

PDF

216.6 KB Created: 2021-03-08 09:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6b70f192f5b4e5ff74b4e3342ba81b14 SHA-1: dbd01931bd3207ad33d657fff2f0fa96240dac5d SHA-256: a23744363d0fd4888cf598fa963166a2545798659c1914ee4653949678d02154
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector suggest an attempt to lead the user to a malicious site, likely for credential harvesting or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=shakespeare+poems+sonnet+139 In PDF document text
    • https://zudejuzire.weebly.com/uploads/1/3/2/6/132681250/xavupejuxu.pdfIn PDF document text
    • https://xovonanukotu.weebly.com/uploads/1/3/4/8/134898985/6833478.pdfIn PDF document text
    • http://torixewiser.medianewsonline.com/why_the_rich_get_richer_and_the_poor_get_poorer.pdfIn PDF document text
    • https://pizizidoto.weebly.com/uploads/1/3/0/8/130873839/3952105.pdfIn PDF document text
    • https://faloxumotib.weebly.com/uploads/1/3/4/6/134646793/luluv-zisubepe-baviboxugunoxa-kepagiwojili.pdfIn PDF document text
    • http://acgmgroup.ru/khiladi_2013_bengali_movie_freee1j78.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/65967771343.pdfIn PDF document text
    • http://maxirem.mygamesonline.org/buluzenidikazegubomudub.pdfIn PDF document text
    • https://vetolotex.weebly.com/uploads/1/3/1/3/131379132/2c00a7d39e74ae.pdfIn PDF document text
    • http://jesofoma.getenjoyment.net/is_it_safe_to_use_a_kerosene_heater_in_a_garage.pdfIn PDF document text
    • http://perevod24-card2card.site/94741079088b8i7o.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/the_magicians_season_5_episodes_recap.pdfIn PDF document text
    • http://mavafesumej.medianewsonline.com/nakamichi_n_power_bluetooth_speaker_review.pdfIn PDF document text
    • http://dkblogin-de.best/sales_follow_up_call_script_template0o9uk.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/pandas_select_row_by_index_column_by_name.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e92ed5-0e01-4ea4-a01d-a09020c9c159/kwikset_powerbolt_2_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c3fa75-3b04-446e-bae1-0e58aeba4496/69010464693.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/best_calendar_app_for_android_and_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/422d06d9-582a-4c21-bd09-4d494513a7d6/arms_reach_concepts_the_co-sleeper_versatile_bassinet_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caaf752d-204f-47e8-b32a-03d2292f64a0/stephen_king_the_mist_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/baseluzivof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7247e594-e2aa-40f4-a4f0-670221859a2e/vuzurupi.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/javascript_array_to_string_format.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://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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002f9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9D3 5568 bytes
SHA-256: 94efc9e573308cef15d2b849609bb1222a7b697ac0a38506fd342a438897333a
font_01_sfnt_off00030c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C93 14624 bytes
SHA-256: 2b7873ef99c3971bdb5e8636dce18fccc921d44bb53c51b077508c2f1455c570
font_02_sfnt_off00033939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33939 17628 bytes
SHA-256: 16d802c5bec7eba7bc681df8684d2c4100068536c15c8f66176934b9afbd8c85

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