Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed2971f78a07b51…

MALICIOUS

PDF

92.2 KB Created: 2021-03-17 11:07:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86d2dd637be29f3c6d3df2de5c677b8b SHA-1: ef3e4538a98eaa594ccba7eca2f3b176d03c7cc6 SHA-256: bed2971f78a07b510c3e6caab6e250762ff03ea84bdf1c02c0a3e8a3ac9ac461
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or content redirection for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a spearphishing attachment designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=skyrim+xbox+load+order+guide
    • https://varovugunigode.weebly.com/uploads/1/3/4/4/134480676/xodubudeduzokusoza.pdf
    • https://rikinosi.weebly.com/uploads/1/3/4/3/134352476/4888158.pdf
    • https://nozezezolakufu.weebly.com/uploads/1/3/2/6/132695232/zadamika.pdf
    • https://nepexinis.weebly.com/uploads/1/3/1/4/131438592/nufofazapa.pdf
    • https://static.s123-cdn-static.com/uploads/4475571/normal_5fe2f472d6efa.pdf
    • https://sevisexabokiro.weebly.com/uploads/1/3/1/6/131637038/kolabolet.pdf
    • https://cdn-cms.f-static.net/uploads/4481154/normal_603775f63c6ee.pdf
    • http://avit0.pro/651061017424qz5w.pdf
    • http://reetodo.online/osha_cfr_29_part_1926_2016x8l25.pdf
    • https://cdn-cms.f-static.net/uploads/4461746/normal_6042f17f821ee.pdf
    • https://nudomituge.weebly.com/uploads/1/3/4/6/134677479/8a9f10cfa682.pdf
    • https://cdn-cms.f-static.net/uploads/4387582/normal_602ea27317503.pdf
    • http://reform-st.ru/how_to_install_hampton_bay_universal_ceiling_fan_light_kitjkeie.pdf
    • https://nulepapilix.weebly.com/uploads/1/3/5/9/135957677/gibekodiz.pdf
    • https://cdn-cms.f-static.net/uploads/4388413/normal_6043565f45b96.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_0bbef204e507456a80e67e8ed211150e.pdf?index=true
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_7874d5c706324b158d0b3c439b7d5b0f.pdf?index=true
    • https://s3.amazonaws.com/dibedamoka/breakup_party_manayenge_video_song.pdf
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_1bd600914fc34b4392a8b2139d9594dd.pdf?index=true
    • https://s3.amazonaws.com/kiguteperilodu/66673568467.pdf
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_b188ff1860f34c78858ff425ec6404ff.pdf?index=true
    • https://s3.amazonaws.com/sazariwapa/mht_cet_2019_answer_key_login.pdf
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_e6f4b656585b4d03ae185d0251895568.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_off00012997.bin
373e53fd1d4ea75f59c091483a82a396eb4cb6ca8165bded9b110a06f674b59e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12997 5444 bytes
font_01_sfnt_off00013c14.bin
6811d71bce559f78bc323073faff3bbe8835e3e665d34a4d119e5ef23f081592		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C14 11504 bytes

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