Malicious PDF — malware analysis report

Static analysis result for SHA-256 3511478164a3c18d…

MALICIOUS

PDF

93.9 KB Created: 2021-05-18 21:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ce45571494f4efb65205eb2b74a70418 SHA-1: 745a6395fbd2f8937e9fedcac7a8f3d984869bf2 SHA-256: 3511478164a3c18d48ab7eb99d2ebf1189050367c80c4c295f9b3a54d1aa24fc
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 0.9992

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://xajibur.ru/strik?utm_term=mapa+de+america+del+sur+con+sus+provincias+y+capitales PDF link annotation
    • http://ruwaxidalemib.iblogger.org/20889928055.pdfIn PDF document text
    • http://riniwovefaraw.22web.org/think_public_relations_2nd_edition.pdfIn PDF document text
    • http://dasuwupozu.22web.org/75595057294.pdfIn PDF document text
    • http://zefazinofajowax.iblogger.org/akuntansi_internasional.pdfIn PDF document text
    • http://tuwafanumi.iblogger.org/fire_emblem_fates_skills_guide.pdfIn PDF document text
    • http://zajigirisu.iblogger.org/flora_bacteriana_normal_de_la_cavidad_oral.pdfIn PDF document text
    • http://vubopukupera.22web.org/lajosusasujimabid.pdfIn PDF document text
    • http://lodulumadumaka.22web.org/44650348769.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/android_10_samsung_s10_plus_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b878803-d021-45f9-9667-c8af3a4d2ba4/what_are_hidden_photos_on_my_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf3cbd0-b994-4746-995e-46cecfbfc1a3/zizagasonorarubatoduxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d58dd76-ac2a-42c6-a8a2-da280b000296/sharp_aquos_quattron_3d_remote_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb73035c-0df8-43a0-b395-852a6d694e42/how_to_turn_on_yamay_fitness_tracker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f15f4d-9dfa-4167-aab7-3ff76ec71c2a/89201537733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed55d5d-3ffa-420e-94d2-413ad5c6ca2b/78316302102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8cdc304-7a2d-454f-a179-f379214ac1d3/fumilofuvubawokimapos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/292f118f-ad58-41a6-b716-681b69b17d9c/letra_de_7_years_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/block_story_android_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a736dac9-b2fd-41f2-9eb9-9ca3daf6ee1d/how_to_test_battery_in_petsafe_bark_collar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e49684ac-af07-4f89-a947-8057bfed3b54/ikea_hemnes_queen_bed_frame_instructions.pdfIn PDF document text
    • http://doliwoxebokuk.rf.gd/all_star_platform_bordo.pdfIn PDF document text
    • http://daduzafez.epizy.com/33292476494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a2b2cb1-f1fb-4700-829f-721f151bacde/sotemobije.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/lopoxedizewe.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_off00012c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C56 5388 bytes
SHA-256: 7bbf4e8440e099d68145de834a62ea570a90565953e226d388f114d125f6268a
font_01_sfnt_off00013ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA8 13228 bytes
SHA-256: 0f535d1a5ce33d002f13bc3b6a5ff8fe3a3da151ee78f0066f442da2544deb17