Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c7941a30b26655…

MALICIOUS

PDF

83.0 KB Created: 2021-04-14 01:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: db7f8c912531dd1f47584917737d05b3 SHA-1: 5db6f61377e95aee1d848005fdde69cc6bf47b62 SHA-256: a5c7941a30b26655f1fd250c39e14921ea7c18c29c23efa0d0d7774d17d44610
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that redirects to a suspicious domain, disguised as a search result. The PDF's structure and embedded content suggest it is designed to trick users into visiting a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=what+is+calculus+of+variations+and+what+are+its+applications PDF link annotation
    • https://cdn.sqhk.co/fukonovum/zjhMhi4/4_pics_1_word_cookies_ice_cubes.pdfIn PDF document text
    • https://lekaretuzej.weebly.com/uploads/1/3/0/7/130738752/paxer_pikawezejuro_wididumozed_mozisijajoda.pdfIn PDF document text
    • https://cdn.sqhk.co/revipidamog/e7YrghB/chitara_wow_guide.pdfIn PDF document text
    • http://retys.fun/jaketogawutumuvuwelatuke0jgzk.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/jhw5gi7/nasa_asteroid_september_1_2020.pdfIn PDF document text
    • http://pakisonuzaruwav.iblogger.org/bengali_movie_sites_list.pdfIn PDF document text
    • https://volilisaxox.weebly.com/uploads/1/3/1/4/131453747/7484127.pdfIn PDF document text
    • http://tiktoktop.design/xamiwaxivofimosixawakoz3k8rh.pdfIn PDF document text
    • https://cdn.sqhk.co/fuludasowipu/jcNqhfS/23701487040.pdfIn PDF document text
    • http://kinokaiff.space/chinese_pattern_vector_freene1f5.pdfIn PDF document text
    • https://gijegemolu.weebly.com/uploads/1/3/1/3/131380899/3438029.pdfIn PDF document text
    • http://trynutra.shop/kajubegamanv9qw7.pdfIn PDF document text
    • https://malolikekex.weebly.com/uploads/1/3/4/7/134718462/8169414.pdfIn PDF document text
    • https://sidonakitipu.weebly.com/uploads/1/3/4/6/134631457/1089606.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
    • https://uploads.strikinglycdn.com/files/b238f62d-ae2f-4791-b007-0950d660581d/monsters_inc_meme_sully_mmm.pdfIn PDF document text
    • http://sixexelotu.epizy.com/manual_motor_cbx_200_strada.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/31007635051.pdfIn PDF document text
    • http://vanabigura.rf.gd/what_words_begin_with_the_letter_k.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/calendario_escolar_2019_bolivia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b158ab3a-79e5-4c22-855b-8e9aa91debb2/fun_easy_yoga_poses_for_2.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/74158765482.pdfIn PDF document text
    • http://fuginejazupede.rf.gd/poisons_and_antidotes.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF417 5292 bytes
SHA-256: 01c4717f0f4242e837113276b867cfd856f01d839188ffcaae2c3ca9c517e5b6
font_01_sfnt_off0001061e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061E 12712 bytes
SHA-256: 6fc9debceb06bd95c1d259851079353262144e84037ce5c4c3429e632ff10078
font_02_sfnt_off0001307c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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