Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d133d8d3f5671c5…

MALICIOUS

PDF

77.4 KB Created: 2021-02-24 13:28:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1edb2bfd6df1ad556e490064b001979e SHA-1: 5b088f594d4ded293ae6752805f48b8af08fb4c5 SHA-256: 7d133d8d3f5671c5e67c37bafb9de5087f51d440b736f90514a0736e66dd32d4
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and an ML classifier, indicating it is likely a phishing or redirection attempt. The embedded links, such as 'https://yafferge.ru/123?utm_term=where+can+i+sell+my+ti-84+calculator', are designed to lead users to malicious infrastructure. The document body, though heavily obfuscated, contains text related to selling calculators, likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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/123?utm_term=where+can+i+sell+my+ti-84+calculator In PDF document text
    • http://hookup157.site/banomoya_amapiano_remix_song29akn.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/rgfgfcu/nihachu_fanart_l_manberg.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/ijj9giC/numberblocks_hide_and_seek_app.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/82431577140.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/jdjbAQu/ates_ve_su_2_kisilik_oyunlar_1.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/mobymax_answers_science.pdfIn PDF document text
    • http://kellys.space/how_to_clean_quadrafire_santa_fe_pellet_stove6r6kh.pdfIn PDF document text
    • http://vorgazme.com/70465259220qijad.pdfIn PDF document text
    • http://oneshops.space/624637882971ls4d.pdfIn PDF document text
    • http://creamwalls.online/204432162375ksue.pdfIn PDF document text
    • http://vvinorama.fun/find_out_gmail_password_on_android_phonevnub0.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/jWVOuen/78797017471.pdfIn PDF document text
    • http://natlab.ru/los_2_periodos_de_la_historia_natural_dela_enfermedadxtvov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413126/normal_5fc6cf98ac023.pdfIn PDF document text
    • https://cdn.sqhk.co/zulatobi/dzX1gwz/vikings_score_right_now.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/aggdkny/new_english_songs_2020_dj.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/j7jdKDa/tv_alphaville_noticias.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/xivugafojetelodis.pdfIn PDF document text
    • http://lenudes.com/ridotaketofususomuxagiw65y4t.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/60789355248.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • 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://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_off0000c8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E2 5468 bytes
SHA-256: 13f6a9489729ee6baed307db2192f69a1ebccf24bbed76dbeee75cde3d794628
font_01_sfnt_off0000db2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2D 6364 bytes
SHA-256: f79b406abbccb1ab29540cbbdd2f1db6311e4f8fdc3f786763bb5e1b99346994
font_02_sfnt_off0000ead8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD8 11480 bytes
SHA-256: 441ba81ad3e1aed877fd3c11d9a0b66d83b8e65460b65c637b40b7e1233cb3c9
font_03_sfnt_off000110d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D0 16088 bytes
SHA-256: 7ccd8150e2c48a9748994740f2a0713563e2bc66516285f786c138bc0577823a