Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d4fd7b09432dc2…

MALICIOUS

PDF

82.8 KB Created: 2021-04-10 23:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5ee9f5492c7101b355604be43a5e62a9 SHA-1: 93f52199a963425d8059627d9b21cf7c80ba50e9 SHA-256: a1d4fd7b09432dc2c9cef04970223c6ba75b09ab9042bc65c9ac89748ce0d1c5
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme to potentially malicious sites. The embedded URLs and the PDF structure point towards an attempt to direct users to external content, likely for malicious purposes such as credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/strik?utm_term=most+popular+safety+topics+on+medium PDF link annotation
    • https://cdn.sqhk.co/lenufetimop/hhvmgc0/vekomanow.pdfIn PDF document text
    • https://cdn.sqhk.co/rifelefiw/iihgqPF/tripadvisor_cuba_havana.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuvimavofo/ihM0PMT/5606183932.pdfIn PDF document text
    • https://cdn.sqhk.co/jepipovi/jdDEJhi/91985220171.pdfIn PDF document text
    • https://cdn.sqhk.co/puvivefujef/caxCJBO/century_arms_c308_upgrades.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/iifjh5K/oscar_de_la_hoya_wife_photos.pdfIn PDF document text
    • https://cdn.sqhk.co/badudexig/mjcHSji/35744532514.pdfIn PDF document text
    • http://vawigeg.22web.org/14889467789.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_9c1ae13e2dce4459ab51adcd93052083.pdf?index=trueIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_10f3e29d65a747bf98e86f48a09c3829.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/724de4d6-b295-4908-9a13-74d0f4dfde8f/what_is_the_best_strategy_for_daily_trading.pdfIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_bc0fb16f6c074ac8b40d64bc83090d9e.pdf?index=trueIn PDF document text
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_349ec836c5264cb78ee5e20ea4120ed9.pdf?index=trueIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_7a927eba02d14d54adb448d0af74a9ad.pdf?index=trueIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_53610b4de29b433fb831fc52dba9a33b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e173a7b-b354-4e12-886a-e1177d8c0a22/what_ink_does_hp_officejet_6500_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe64a275-5f2e-4d6e-86dc-0fc9c98d8625/campo_ocupacional_de_psicologa_clnica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24c4fac3-f189-437b-8f06-cb34dc7360a3/audio_technica_at-lp120xusb-sv_direct_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6a34118-ffc3-4b2e-b3eb-50d1c4013023/nekamup.pdfIn PDF document text
    • https://bed2d873-735b-46bb-a8a3-264d0455df4e.filesusr.com/ugd/03ede2_2204558b75814535acc389203dc90ab1.pdf?index=trueIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_f90b96c3e1bd4b2b8a8bad66a4134361.pdf?index=trueIn PDF document text
    • https://a26b494c-4f54-4b9d-aaa3-e02d462d315a.filesusr.com/ugd/c6268f_c2db901a374749fd9fa67cf42b960851.pdf?index=trueIn PDF document text
    • http://gusizozubamu.epizy.com/cctv5_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF922 3428 bytes
SHA-256: ae492c9eca3b079807cbb2c168d88658952d9a6286479c310702c0bcdd07155b
font_01_sfnt_off00010555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10555 5408 bytes
SHA-256: 55c1cdc6d6da8dfa02835129703a27d0d0812db7437a64aa5cdbd2b838fadae2
font_02_sfnt_off000117bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BB 10900 bytes
SHA-256: 2794a2a914c401b0dfb9bc201111358800052b7e60f486540a435e6a865baf02

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