Malicious PDF — malware analysis report

Static analysis result for SHA-256 706c9ed64248c14a…

MALICIOUS

PDF

86.2 KB Created: 2021-03-08 21:37:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0380e322a4b5eea5991a7a2d7a6c5d55 SHA-1: fd8f87d23abf0a0e07a4ebcf1fcfa6adc5060fe9 SHA-256: 706c9ed64248c14a89ea4414ba990346d1d72a3d0846d25338ab63703d18f7db
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URI heuristics point towards an attempt to drive traffic to malicious or deceptive external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/aws?utm_term=how+to+start+a+furnace PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479942/normal_5fd64c4ced948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_604425bb58171.pdfIn PDF document text
    • https://cdn.sqhk.co/rowunozimop/ggiihgF/freedom_writers_diary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409102/normal_602d78373828a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_603b5367b76b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415543/normal_60257660c1abf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485016/normal_5ffd994e0c162.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/gcyYRjj/97514012701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425723/normal_60275892252fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391621/normal_601f861112c5c.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/jgfhcjh/dell_hd_wallpapers_1080p_for_laptop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/android_9_gestures_xperia.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/nortel_phone_manual_1120e.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/metformin_500mg_bd.pdfIn PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_3b3569b124ae434488369fba9bc387ea.pdf?index=trueIn PDF document text
    • http://dipiwidafebezi.epizy.com/remington_700_vtr_308_barrel_twist.pdfIn PDF document text
    • http://lenixad.epizy.com/olympic_lifting_program_with_bench_press.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/verbs_with_irregular_yo_forms_worksheet_answers.pdfIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_fc7eb983dd6646d48ceab87b804c7ffa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/16763718502.pdfIn PDF document text
    • http://zufagubiles.epizy.com/ll_bean_flannel_bed_sheets.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_off0001145e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145E 4896 bytes
SHA-256: c00e3af25c11e30c3fef39c81ea2caf633f64b9bd54600426b50028873ab2072
font_01_sfnt_off00012526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12526 11492 bytes
SHA-256: 2f56b4fd4aa1cd56beef41a4d8f3b38e4b44eff879998f0d01da20209c40df30

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