Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2efefad35b22f5…

MALICIOUS

PDF

84.6 KB Created: 2021-04-18 16:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: eaa092d36c929f571561693ca81cb77e SHA-1: 26a6e76841109079bad63de60b6fda8aa9b9ecaf SHA-256: 1b2efefad35b22f5f7572c080d4b565813e2a698dc2ba177f3663345d51bb87b
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with a primary focus on the URL 'https://soxebez.ru/strik?utm_term=with+god+i+can+do+anything+quotes', suggesting it's used for phishing or to host a secondary payload. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious nature by indicating the PDF is part of a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • 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://soxebez.ru/strik?utm_term=with+god+i+can+do+anything+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465908/normal_605a5805c7481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485696/normal_601638f032875.pdfIn PDF document text
    • http://flathead.us/north_america_map_blankyvimw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384459/normal_5fcd6f918d9b0.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/grade_11_maths_textbook_sinhala_medium5eedq.pdfIn PDF document text
    • https://cdn.sqhk.co/womafafowix/xWggAgc/37341538078.pdfIn PDF document text
    • http://pe50off.pro/12925161104einni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371524/normal_5fe31fdd34501.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472793/normal_5fc997d3c5f03.pdfIn PDF document text
    • https://cdn.sqhk.co/wigalefu/5jjgg60/chores_in_this_house_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_6052abf96a2b9.pdfIn PDF document text
    • https://cdn.sqhk.co/wemigiwim/biigds9/22814972290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452193/normal_6038724c07b9a.pdfIn PDF document text
    • http://vulgargirls.fun/cara_menyelesaikan_score_hero_level_4006d0ur.pdfIn PDF document text
    • http://idealica-italy.site/915175406487rh35.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/iegebMr/facts_about_spain_food_ks2.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/Iiiggjg/golden_age_cabal.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/75a7cf78-2c20-4d03-8893-e347a026a8dc/resawefil.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/cesare_bonesana_di_beccaria_an_essay_on_crimes_and_punishments_1764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69b06e91-6bb6-45eb-9e57-a0588bd409f8/jirivupebozoxiwubiravaj.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/pukekib.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/african_vocals_samples_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df87405-3ecc-4784-ad60-9e7aff3c4df4/gimefabudosokopob.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/whatsapp_for_nokia_200_java_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae0e436-73b9-4202-ae41-0cfd901db1c1/best_app_to_listen_to_music_for_free_without_internet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f627704d-17d1-4dd1-ada8-a29eaa9cdd49/gravely_zero_turn_mower_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/daxegudadudinijize.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E00 5316 bytes
SHA-256: 3269d7073ef3b587a58ba3f341d732b5ec4e1f1360371c7f88aa1c74523c2047
font_01_sfnt_off00012026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12026 10936 bytes
SHA-256: 616e9e4e08424e9a034ee472169f0f1b21942b58819468f647b35e6cf4ef90bf