Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff160170c890e24…

MALICIOUS

PDF

75.4 KB Created: 2021-05-20 15:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ad4a5e25e0898d00e5a24c50a5ff963f SHA-1: b63932f484e9a91d9ef10d442a6b965acc1bdbc4 SHA-256: 5ff160170c890e24deef1c58a8e38bd100edead79aff6846af5e67add23860c1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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.
  • 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://pelibifir.ru/strik?utm_term=novela+os+dez+mandamentos+nova+temporada+capitulo+63 PDF link annotation
    • https://posolefuriw.weebly.com/uploads/1/3/4/3/134374222/1258827.pdfIn PDF document text
    • https://tifixexeruwa.weebly.com/uploads/1/3/2/6/132682204/kaxopopumuwoma_solumadubep_rexukofi_fomewaxewaroz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421036/normal_600e364064449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470841/normal_6034ec74730e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403143/normal_5fe10cc4c64eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_602bd980e9f32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443810/normal_604cd1406e6a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421036/normal_604f0877cc4ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f6a9bd-426e-4300-b781-7750a12d50ac/30154350229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ba7ca4-c889-4926-93ba-520fa7a4eed8/outlines_of_legal_language_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b617c1-66c7-4f03-8b51-ab46bc55e495/to_the_woman_i_once_loved.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3be98ba-748f-47e5-810d-6bd2911e1213/37831745721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64eea5a1-b076-4fd4-81c3-faad757c62b9/rinnai_panel_heater_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34149e1c-13ed-4585-8276-923c1345e12f/28722455159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/995b4df0-f847-454b-bed3-083b0ed57bf2/wufafinuwekakuxikotuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63db91c1-4113-4af0-a356-6ac090895314/washington_post_reporting_on_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/244fbd84-7d8e-4dc7-ad8f-31c3beacca87/how_to_connect_hp_envy_4500_wireless_printer_to_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db489f75-3e2f-4ddc-85c5-5ee7da7c50e4/night_shift_warehouse_jobs_hiring_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36ae503d-efca-4f41-892b-04b8437f3da0/la_casa_de_los_espiritus_pelicula_completa_en_espaol_online.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_off0000e441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE441 5616 bytes
SHA-256: 7486e71f3bd8c723e09a117640eb763799ec37928f79abe0cd4cbb1aa7bd9c92
font_01_sfnt_off0000f755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF755 12932 bytes
SHA-256: abb6d98c6144103eef9e95e9c764f975654dff49ebcc2015098ae45a382e2a1f

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