Malicious PDF — malware analysis report

Static analysis result for SHA-256 623f1183ed2a6c82…

MALICIOUS

PDF

87.2 KB Created: 2021-04-09 09:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a4e61a3feb78650f77f1e2a55197f664 SHA-1: c538300900ec3e2011d767fc9293d1a501bc8e5d SHA-256: 623f1183ed2a6c82b76a4223e16224ab06f081689ac8d949e7cf0a4c750e89ac
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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
  • 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/strik?utm_term=ipod+nano+watch+case PDF link annotation
    • https://cdn.sqhk.co/ketejeti/aMbij2a/89220190574.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/dqjd2Yi/16215151330.pdfIn PDF document text
    • http://sokolov.fun/hinterland_series_4_episode_guidexx3yd.pdfIn PDF document text
    • http://fbdirect.site/98375479424h6lo0.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/fjaBgjL/49093979306.pdfIn PDF document text
    • https://cdn.sqhk.co/tusupuwadoda/P2jccNm/pinball_z_windows_xp_cheat.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/dGCoJje/choppa_style_lyrics_youtube.pdfIn PDF document text
    • http://munupesifak.22web.org/funidefajejo.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/jeggTLf/how_much_does_flickr_pro_cost_uk.pdfIn PDF document text
    • http://urott-hu.com/emergency_preparedness_communication_plan_templatedvgxe.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/Bs1vhf7/sidez.pdfIn PDF document text
    • https://cdn.sqhk.co/sepagumal/jefAzQM/amc_first_colony_24_imax.pdfIn PDF document text
    • https://cdn.sqhk.co/lexewagoz/gijifhi/brick_builders_eugene_oregon.pdfIn PDF document text
    • https://cdn.sqhk.co/rolidofajug/Xiii2EY/boomerang_cartoon_app_review.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://bosefijov.epizy.com/autodesk_sketchbook_pro_mod_apk_bossapk.pdfIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_ac41842ce96d4f76871f5c4bcc32847f.pdf?index=trueIn PDF document text
    • http://nuvefugokudob.epizy.com/praeludium_1_bwv_846.pdfIn PDF document text
    • http://lefamotepukezo.epizy.com/korig.pdfIn PDF document text
    • http://gidozowelixije.rf.gd/canonical_form_of_orthogonal_matrices.pdfIn PDF document text
    • http://mujujum.epizy.com/interaction_1_reading_answer.pdfIn PDF document text
    • http://zuxamivim.epizy.com/irs_ein_form_ss-_4.pdfIn PDF document text
    • https://b4e79a3f-0083-4b26-8056-4fe87fb46dfd.filesusr.com/ugd/332c1b_b6894ef97abe4dc7835eff06721a946f.pdf?index=trueIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_247b3a28da4f4fd0ba455878a10057fc.pdf?index=trueIn PDF document text
    • http://mapiwenasadig.rf.gd/mawosozifijitozipoxana.pdfIn PDF document text
    • http://bejuxufuvojofa.rf.gd/chayakkadakkara_video_song.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CA 4804 bytes
SHA-256: cb7cf940139a7cea46ed7f6dc981099b5beaf20c53c16e1dcf142d89b7970ba8
font_01_sfnt_off0001051f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051F 11132 bytes
SHA-256: f87e2b5a12aebc09d44f1f71c04618e82f40e76249828b805462524bdfbd6975
font_02_sfnt_off00012ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADA 16060 bytes
SHA-256: 676c0883841b43d00b7ee9e48740bba0cd0e68334271d7a078f050a57dd23d8c
font_03_sfnt_off00013f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F6F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.