Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1872f0d4502ecca…

MALICIOUS

PDF

77.3 KB Created: 2021-04-15 17:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 97514540445fd3680f8309a68a8d80a7 SHA-1: 53cb570c5262ba6597c47845623275575d4dd3a0 SHA-256: d1872f0d4502ecca7297ede014cd22d7211fe381b52e3576b5e2657c55ba5252
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URIs, with a significant number pointing to disposable hosting. This pattern suggests the document is designed to redirect users to potentially malicious websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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.
  • 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://dugedepap.ru/strik?utm_term=que+es+estructura+del+texto+narrativo PDF link annotation
    • https://cdn.sqhk.co/defisepeniba/gfShaja/new_english_songs_2018_mp3_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/ighgjhE/police_stickers_wastickerapps._com.pdfIn PDF document text
    • http://teren.fun/554699830567lgv0.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/luvunugoz/Lfhb0je/86087250346.pdfIn PDF document text
    • https://cdn.sqhk.co/rebosuvut/zGO4jai/sijopojowiduweviro.pdfIn PDF document text
    • http://agentsoft.space/cambridge_primary_mathematics_challemjaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/eCauigt/99587796384.pdfIn PDF document text
    • https://cdn.sqhk.co/kezagajasiw/gjZjhvz/according_to_matthew_full_movie_480p.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluniziwav/jy9MoR9/steve_madden_stretchy_platform_sandals_in_black.pdfIn PDF document text
    • http://nuxuzuruguli.mypressonline.com/how_to_clean_a_espresso_machine_step_by_step.pdfIn PDF document text
    • http://kovatafob.mypressonline.com/bapesuvigowiladorixedota.pdfIn PDF document text
    • http://karaulovlife.site/96231494399ftnl5.pdfIn PDF document text
    • http://vifubavawet.mygamesonline.org/1671213075.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/1iaiaXy/armageddon_gear_single_point_sling.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_2eace1174f5246bf8ccb2689d6807fa7.pdf?index=trueIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_0097bcc010434f00b1669cab20d1d903.pdf?index=trueIn PDF document text
    • https://60b161a2-b511-46bc-b48c-7ca4331f2db3.filesusr.com/ugd/34b71b_22c6695e8f8d4126b22f2a81c6b9bef8.pdf?index=trueIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_7382cc53f94e40e28fcf04e04afd41a7.pdf?index=trueIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_516ca96df07c4f23886e7a1b39bbfaf5.pdf?index=trueIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_78cddd20025347079a73f999f4a34a02.pdf?index=trueIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_90c1fefb220247338cda9315df9ec229.pdf?index=trueIn PDF document text
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_7a3aa5526a3d4d0e8e801684c100a8be.pdf?index=trueIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_b912bdc0e2fc4b59b56e52d94e8ff675.pdf?index=trueIn 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_off0000ee4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4C 5124 bytes
SHA-256: 9eeec02a3155525437a648aef81e12b18c819e483851b4288e269e58c437ccd1
font_01_sfnt_off0000ffca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCA 11780 bytes
SHA-256: 4f3bfce2d85e9d69375c2a2b108d161abf37331245692d8ffa150bc81d29b35e

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