Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d911d91f08f0834…

MALICIOUS

PDF

100.6 KB Created: 2021-02-28 05:42:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ce876312494490b596875a3cb9e9a9aa SHA-1: 2e80c9b99d64ad10d9e1d2cb8192773e05808a2c SHA-256: 2d911d91f08f08346d4b7dbea8db57b650074a729eff950761ad6bdbc5342d02
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'periodic table symbols and names crossword puzzle answers'. The presence of external URIs and the ML classifier's high confidence indicate a malicious intent to redirect the user to potentially harmful content.

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 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://jottigo.ru/wix?keyword=periodic+table+symbols+and+names+crossword+puzzle+answers PDF link annotation
    • http://tactical-jacket-sale.shop/wilexperi4.pdfIn PDF document text
    • http://shop-onlain.fun/fijoru7ke7w.pdfIn PDF document text
    • http://1ux.site/similes_worksheet_for_class_63yys3.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/teatv_8._5_mod_apkf5c8a.pdfIn PDF document text
    • https://cdn.sqhk.co/kosuxatune/icjghaP/jukezegevidixegowagimuka.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/87071858487.pdfIn PDF document text
    • https://dogewirezuv.weebly.com/uploads/1/3/4/6/134699505/3277216.pdfIn PDF document text
    • http://daating19.site/shootout_at_wadala_full_movie_watch_onlinezvuqt.pdfIn PDF document text
    • http://thesimplycompleteseries.com/naruto_shippuden_movie_2_english_dubbedlcthf.pdfIn PDF document text
    • http://draiwenstore.online/john_deere_riding_tractor_toyfcpvg.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/modibavutupuk.pdfIn PDF document text
    • http://erkutungotu.com/al_final_mueren_los_dosqfiwl.pdfIn PDF document text
    • https://cdn.sqhk.co/lepagesali/ihjd6ge/34075275381.pdfIn PDF document text
    • http://prizinsta24.online/burnout_video_song_hdyaar._comb7s7i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/radio_shack_multimeter_manual_22-812.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/zitevekedime.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/likogajusovizofibazomegod.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
    • 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_off0001339c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1339C 5604 bytes
SHA-256: 6558b16d8cfa3bccd043d3b4e495c71d91bf74ba8bb943ae1531c0a2dfb25cce
font_01_sfnt_off000146a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A5 10624 bytes
SHA-256: 22a754ff759ea1dc493d1ba24e7c649f3533a6b916b2fb7a04e05e1779bee19c
font_02_sfnt_off00016b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B2C 17328 bytes
SHA-256: c70bfa6a43d9eadbe0e0811b2e9e7982d7c6abfb3f936eb56b9f779beafe8004

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