Malicious PDF — malware analysis report

Static analysis result for SHA-256 3455894b497c1505…

MALICIOUS

PDF

76.3 KB Created: 2021-03-22 19:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8140e10546102faaafd3c7c92e8d53a6 SHA-1: 3c2d9657c0e88aa36df4756dd7a26abcb2e091ee SHA-256: 3455894b497c15056c7825e1a353ce74749c3f48bd950b5e0b58bcb465e03e22
186 Risk Score

Malware Insights

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

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 0.9991

Heuristics 6

  • 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 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://dafemum.ru/strik?utm_term=the+holy+quran+java+app PDF link annotation
    • https://visimekariluvog.weebly.com/uploads/1/3/1/4/131483525/036fc891fc1.pdfIn PDF document text
    • https://vilofezilo.weebly.com/uploads/1/3/0/7/130740065/misaniwasitafopob.pdfIn PDF document text
    • https://jetovalanowu.weebly.com/uploads/1/3/0/7/130739462/giwikovusifawisu.pdfIn PDF document text
    • https://radasezase.weebly.com/uploads/1/3/4/6/134643415/rajalavilubiro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530171/normal_6044f5c337595.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382948/normal_5fcddf3e796d5.pdfIn PDF document text
    • https://pekixutub.weebly.com/uploads/1/3/1/4/131453658/cb553c398db6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_7d897acda444491daa9eb5db5ff87326.pdf?index=trueIn PDF document text
    • https://5db246a0-94da-4013-9f64-c970003367b9.filesusr.com/ugd/ca5179_f95334c49cef48859c4bc2235978d428.pdf?index=trueIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_dc59e3da1d424fd787d65ac6d8611c20.pdf?index=trueIn PDF document text
    • https://99f4a897-b223-4833-863a-50ad465ba5d5.filesusr.com/ugd/8e2371_a0f2b9b70ec84b03b8f405af493ea1cb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b386859-0803-4365-9abc-21d0cb4dc467/how_to_get_revelation_from_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4245b03-0e0b-4bfd-ab04-7ae1a0d729a9/the_power_of_praying_and_fasting_ronnie_floyd.pdfIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_aa2226708d7741e3aced1e0feb103b3e.pdf?index=trueIn PDF document text
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_ebaff80368d442dc8e14678f406b1025.pdf?index=trueIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_c3f01b6b6e124d2694d4dff5f31d5a54.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2741b769-711f-406b-9de5-0403ba87d6f0/parrot_bluetooth_ck3100_pairing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2540898f-293c-4c75-9a3b-9f0c1dd1913b/death_note_movie_l_actor.pdfIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_45e5f83e21d14e74b41b1431d9c33a10.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e7af6f-0309-4ca3-bf39-6f6ca41ced1a/what_is_italian_renaissance_art.pdfIn PDF document text
    • http://vipowiso.epizy.com/4k_video_free_song.pdfIn PDF document text
    • http://dixadenidufudu.epizy.com/beelzebub_s_tales.pdfIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_14cfb13d770149e98bc126b4901b25dd.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94B 5040 bytes
SHA-256: 18b9305d94cdf08ceb8ba086c878ab800d19ed3af97b9b3c63c0557577bbea16
font_01_sfnt_off0000ea81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA81 10392 bytes
SHA-256: 415616cf43dd82fa5cc8db30f3c8956f8fce4c03ea3b27ef97ded45a9039fb95
font_02_sfnt_off00010e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E31 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd