Malicious PDF — malware analysis report

Static analysis result for SHA-256 add968e7026ea8d3…

MALICIOUS

PDF

85.3 KB Created: 2021-03-28 06:39:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ce96e31dd1c8799dc93257d8adb1a179 SHA-1: 7053f4d1502cb8d0ca00432be7332b420d19b265 SHA-256: add968e7026ea8d35ff7c90b3a836879233e194721e79bd3a113a76de08538f9
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/123?utm_term=octopus+app+apk+free PDF link annotation
    • https://cdn.sqhk.co/kogewole/geihld4/10516591796.pdfIn PDF document text
    • https://cdn.sqhk.co/xozifejor/gXjgcsq/animal_jam_play_wild_beta_testing_sign_up.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdfIn PDF document text
    • http://copyrightram.net/cute_love_letters_for_boyfriend_on_his_birthdayy2jlg.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/higVzig/fujikuzax.pdfIn PDF document text
    • https://cdn.sqhk.co/fusevesapime/jm2giij/stickman_war_2_player.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/b7jhjeK/world_basketball_challenge_unblocked_66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459321/normal_603c7d43b94c7.pdfIn PDF document text
    • http://zofozefevuf.iblogger.org/gta_san_andreas_cheat_codes_free_download_for_laptop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454679/normal_5ff02a3654d9d.pdfIn PDF document text
    • http://f1l3download.site/lofukiduznvk4m.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/igYaNhf/jasewibetixudofi.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/AijfUXA/3298214228.pdfIn PDF document text
    • http://creditpm.com/how_to_get_cursor_back_on_hp_laptop_windows_10os11j.pdfIn PDF document text
    • http://13millions.store/telunuvawibzzf9x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_6045f0cd4060b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_eeddb44b0b50428da87a496d626a27b1.pdf?index=trueIn PDF document text
    • http://kafojifonetawaj.rf.gd/online_dbt_therapy_for_bpd.pdfIn PDF document text
    • https://148d48ef-a78d-4e34-a4d2-755cfbac042a.filesusr.com/ugd/ccca9b_e2f9033917ab456e956d738e78d657b2.pdf?index=trueIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_e30ea2fb376d4e9a873b7cd1a5165f65.pdf?index=trueIn PDF document text
    • https://81d89a68-18ac-4cf1-ad00-ddd5d2f7da41.filesusr.com/ugd/ed58ef_5a45ab2847b7442f8323463407fa297e.pdf?index=trueIn PDF document text
    • http://zedagemutumus.rf.gd/31393962049.pdfIn PDF document text
    • http://maxaluvobewog.epizy.com/reflections_across_a_line_worksheet.pdfIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_044eb5ca0e7e4d049d1e85a4f4d51f72.pdf?index=trueIn PDF document text
    • http://sasozazanixe.epizy.com/teviwekuwolexe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE601 5068 bytes
SHA-256: 85ecc4d1056d1b4a27a65ff7ef029a7bf31f882256621b68d2f93fee4c63a14f
font_01_sfnt_off0000f74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74B 5124 bytes
SHA-256: b65c0f406b3f61639301a05b4ac096970c4e139c145a42e9d0eecf4905c2e816
font_02_sfnt_off0001098c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098C 10968 bytes
SHA-256: 0233ba8a63580e57ad324a778992dac3bd236c6daf5d8f0dc5aaf3b514f0ef40
font_03_sfnt_off00012ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECC 17592 bytes
SHA-256: b38e7c2b3e0b8754981df50e4cb91e09e330b16395dc5eadad7cdcb104270460