Malicious PDF — malware analysis report

Static analysis result for SHA-256 f35436676fabacbf…

MALICIOUS

PDF

67.1 KB Created: 2021-03-01 06:49:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 3474dc3e9bbd5a67e80c991e09a42be4 SHA-1: 12ca4e19e39e1e4fc1ab548fb34c3d76ba92a45f SHA-256: f35436676fabacbf93ba9c57cdf3439eeee5564c48705901429ae33cb09ea2f4
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to a "Husky power washer 1650 owners manual". Numerous embedded URLs, many hosted on disposable domains, point to a link farm designed to redirect users to malicious content, likely a phishing or malware download site.

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://midufefew.ru/strik?utm_term=husky+power+washer+1650+owners+manual PDF link annotation
    • http://jofifuneku.medianewsonline.com/toshiba_ct-8037_apps.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/19862839879.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/does_cox_cable_offer_newsmax.pdfIn PDF document text
    • http://afracheat9.xyz/dragon_ball_xenoverse_2_game_guidemxxuo.pdfIn PDF document text
    • http://atelier-spb.com/is_indian_stock_market_closed_tomorrowpvvs6.pdfIn PDF document text
    • http://idealslimitaly.site/cherry_tree_lane_full_movie_freeo6llw.pdfIn PDF document text
    • http://doweryklkq.space/charm_city_kings_full_movie_hbooozrp.pdfIn PDF document text
    • http://copyrightproblem.com/xeripovumedikopopedibeqcw.pdfIn PDF document text
    • http://proba7.xyz/hanya_rindu_andmesh_mp4o5j60.pdfIn PDF document text
    • http://mirijesuwakug.sportsontheweb.net/focusrite_scarlett_2i2_3rd_gen_setup_mac.pdfIn PDF document text
    • http://bulewedulipofam.iblogger.org/jalokejudidovozem.pdfIn PDF document text
    • https://vesokawewewavi.weebly.com/uploads/1/3/1/3/131382886/4831165.pdfIn PDF document text
    • https://judexesadizit.weebly.com/uploads/1/3/0/7/130738912/pulatenokog.pdfIn PDF document text
    • http://save50it.info/pejamovimaeb1e6.pdfIn PDF document text
    • http://reform-st.ru/fonomafogadutosupejugucst9j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuwedutukuw.epizy.com/xokavogevegudi.pdfIn PDF document text
    • http://bowomufe.epizy.com/20918891415.pdfIn PDF document text
    • http://bopenakonaj.rf.gd/92940429301.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/how_to_get_iphone_11_user_guide.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_off0000c8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CD 5752 bytes
SHA-256: 0be59b29c422d97d355f24bf449614417beb347970b32ea865626d69b2c20715
font_01_sfnt_off0000dc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC55 10232 bytes
SHA-256: 5c15fbfb0ae7be2a935a5686d58dfdc9eb79f7754ac8221ce05743df7316a6c1

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