Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c662b6355ca79d…

MALICIOUS

PDF

105.1 KB Created: 2021-03-18 09:57:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f1e0fa9ff56c91993ac226f3eb65afc0 SHA-1: 842984927cf96f30cf229c809c622a60d84d36dc SHA-256: 15c662b6355ca79d2f5daf3c29703b58513a02aaea46c6410d759b303b4c2f2b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9986

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://leonvi.ru/123?utm_term=chal+jeevi+laiye+full+movie++pagalworld PDF link annotation
    • https://cdn.sqhk.co/rudolikube/c4F4TA8/android_get_sim_card_country_code.pdfIn PDF document text
    • https://mubuzetuwifo.weebly.com/uploads/1/3/4/7/134703000/5274472.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/aRjegdt/toilet_keeps_running_easy_fix.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/69194255691.pdfIn PDF document text
    • https://cdn.sqhk.co/miweguzeg/eTJGJjh/salagosiwofuvekububofexiw.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/ihioatM/gebez.pdfIn PDF document text
    • http://mugeziv.22web.org/bppv_exercises_in_spanish.pdfIn PDF document text
    • https://luwibizikowar.weebly.com/uploads/1/3/4/4/134483868/819a5b7219d1.pdfIn PDF document text
    • https://tagenomamoz.weebly.com/uploads/1/3/4/4/134476715/vutozawivuref.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/5433337.pdfIn PDF document text
    • https://kofoxutekibefa.weebly.com/uploads/1/3/1/4/131454286/4820954.pdfIn PDF document text
    • https://cdn.sqhk.co/vilosezuj/ie59Uhb/68217176937.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://vubuzixefixa.onlinewebshop.net/spencer_kagan_cooperative_learning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79cc0a48-75a8-42c2-9703-b36244c648ea/what_is_private_cloud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8017cf-7e2d-4fb9-8654-8f72373ddf5b/grohe_shower_valves_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d904c9c4-b7b0-4d37-a185-1fa3a34f40fa/fivuzezedatenolagudufufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/615216d4-8cc2-4b64-8093-bc738af205de/creative_sound_blaster_x-fi_titanium_7.1_pci-e_sound_card_sb0880.pdfIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_298f1b1f2da546a1a03f6d963ffb9a6c.pdf?index=trueIn PDF document text
    • http://talusulimatedo.rf.gd/application_for_schengen_visa_italy_word_format.pdfIn PDF document text
    • http://xemunebo.atwebpages.com/malezidakutiniwes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3af331f0-1fa7-40a8-8c93-617182c9b097/zevanobufurit.pdfIn PDF document text
    • http://naranosufok.atwebpages.com/siwirejawuzidilogivisas.pdfIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_04fb4c74187d4fca876eda33bfce958f.pdf?index=trueIn PDF document text
    • http://tiwatimab.atwebpages.com/what_state_has_the_coolest_summer_weather.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_off00012e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1C 5512 bytes
SHA-256: 6a217217126391539042c8483c2fbe927110da8197376966dd1bd3234750412f
font_01_sfnt_off000140d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D1 15972 bytes
SHA-256: af85d678ae57c8644d61996c599f1ba94623ede1f10702db9cb09b622f4d13e4
font_02_sfnt_off000172ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172BA 9596 bytes
SHA-256: 166869f690277fbad7bb4afcc095eb16acd8ab57977c74cfb491f739d67bedfe