Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9586dbfc2681f7…

MALICIOUS

PDF

74.6 KB Created: 2021-04-18 16:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27f95f0eee9d5dafd5f4f9cdc7eb48a0 SHA-1: 45c3048bd2fa5d25efc774b4596f852c27a5e39b SHA-256: 1c9586dbfc2681f75d84d3c457f96f2fdbfdd7c8379f5fd3f64e83f830f1f4f8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate this is a malicious PDF, likely used for phishing or distributing further malware. No scripts were extracted, but the presence of numerous external links points to a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=panasonic+microwave+used
    • https://wivujugojuz.weebly.com/uploads/1/3/4/8/134883460/zifekusa_vuwovezenifovi.pdf
    • https://sutafosuteloxep.weebly.com/uploads/1/3/0/8/130814172/5085937.pdf
    • http://xuzotudaraderuf.mypressonline.com/boron_health_benefits.pdf
    • http://nadipewin.mywebcommunity.org/cuando_se_cae_el_cordon_umbilical.pdf
    • https://rojirewika.weebly.com/uploads/1/3/2/7/132710632/a5a98dd9c7d5f.pdf
    • https://daxakowov.weebly.com/uploads/1/3/4/7/134704390/donizitip_tefugakaremoga.pdf
    • http://moxupasasitote.mywebcommunity.org/2918171867.pdf
    • https://nokibuvekunel.weebly.com/uploads/1/3/1/1/131164430/d037179429cec.pdf
    • http://vosajizegek.mypressonline.com/brilliant_answers_to_tough_interview_questions.pdf
    • https://dufeduvu.weebly.com/uploads/1/3/4/4/134481569/331ddb2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5db7966b-98a6-4514-afc1-cb0174d9a342/words_that_start_with_overa.pdf
    • https://uploads.strikinglycdn.com/files/dee4e42c-bc77-43cb-b6b8-7716d076814c/cuantos_metros_cuadrados_equivale_un_metro_cubico_de_concreto.pdf
    • http://noroved.myartsonline.com/strength_training_anatomy_3th_edition_download.pdf
    • https://uploads.strikinglycdn.com/files/f06c8b32-9253-4bdb-8dd3-9e5354b36f86/74644630569.pdf
    • https://uploads.strikinglycdn.com/files/f009d97f-efcd-4a6d-9137-7d27a1a6dd38/how_much_was_mj_worth.pdf
    • https://uploads.strikinglycdn.com/files/bc30bd43-ef4b-49c8-ade6-2733aff7edcb/why_is_my_jeep_cherokee_not_starting.pdf
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_8ffd1a410a354514b7c224af697f37a7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8db6fe83-8145-475b-bf83-6e03a3430a82/how_to_analyze_pretest_and_posttest_scores.pdf
    • https://uploads.strikinglycdn.com/files/cc01565c-4717-4ea0-9df5-49a54a497175/90442355449.pdf
    • https://8acf0fc4-2da8-4686-9788-d7840b5449fc.filesusr.com/ugd/fab691_6f156f08406444709d503fe482fcf32f.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e751.bin
f11227c91d48b2b6ed7d9661153d7d9251e4cf986cc978529d7f465e1b385024		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE751 5208 bytes
font_01_sfnt_off0000f903.bin
11a6678b5f02a33df15fe070805e6a4f8cee7cecb501186af20c6302d90e2c0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF903 10568 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.