Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b704198ae671dc…

MALICIOUS

PDF

74.7 KB Created: 2021-04-03 12:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 134ed6117dac2bc8c11662d7f2812195 SHA-1: 9607f1c6026a60d38d9eeffb324a005008e90dfb SHA-256: 35b704198ae671dc8f4ba5d74898f8c059f2ce9e0e41fdab41649fad7b8ddcbf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are hosted on disposable or dynamic DNS services, indicating a link farm or phishing infrastructure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/award?keyword=phonics+coloring+pages+pdf PDF link annotation
    • http://gonzo-3d.com/soleus_ky_80_8_000_btu_portable_air_conditioner_dehumidifier_and_fant29l5.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/matafi-tuniparus-relofe-gijoxexowu.pdfIn PDF document text
    • http://study-english-02.space/how_to_reset_your_fitbit_versa_lite983rk.pdfIn PDF document text
    • http://letgtma.bid/craftsman_lt1000_original_pricegruzk.pdfIn PDF document text
    • http://tunizunifegitof.66ghz.com/bihar_masti._in_2017_video.pdfIn PDF document text
    • https://sazavilekin.weebly.com/uploads/1/3/4/8/134851962/siretaw-gadoxaru-wirodemewekelo-jonupazajuf.pdfIn PDF document text
    • https://cdn.sqhk.co/tumozaraf/ihgjfif/bus_simulator_original_android.pdfIn PDF document text
    • https://zoguripan.weebly.com/uploads/1/3/1/0/131070442/2332825.pdfIn PDF document text
    • http://sipivide.iblogger.org/23261520240.pdfIn PDF document text
    • https://gedesinikus.weebly.com/uploads/1/3/5/3/135323437/6427996.pdfIn PDF document text
    • https://cdn.sqhk.co/nudofarus/jiI5Qgj/planet_star_wars_episode_2.pdfIn PDF document text
    • https://cdn.sqhk.co/vutowogipu/ShaGgec/traffic_accident_near_me_yesterday.pdfIn PDF document text
    • https://mogiwivimar.weebly.com/uploads/1/3/4/7/134731652/mokitewamufaguga.pdfIn PDF document text
    • http://pugolasasiv.22web.org/cerumen_impaction_coding_guidelines.pdfIn PDF document text
    • https://xudowiwigikit.weebly.com/uploads/1/3/4/4/134462868/8de15de5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kidoputuf.epizy.com/how_to_do_dbt_at_home.pdfIn PDF document text
    • http://notufexunu.rf.gd/armies_of_legionfall_reputation_farming_guide.pdfIn PDF document text
    • http://zomimek.epizy.com/winure.pdfIn PDF document text
    • http://gebaruzowulidus.epizy.com/makerere_university_courses_and_tuition_fees.pdfIn PDF document text
    • http://dekagijudejiz.rf.gd/33465986314.pdfIn PDF document text
    • http://fugewad.rf.gd/reporabusiga.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_off0000e59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59E 5420 bytes
SHA-256: 0a565bf68b243a5cc75249b688a34fe9d3827e44db47e479dabfa7cfd87a78b3
font_01_sfnt_off0000f807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF807 10900 bytes
SHA-256: 167c4645e15401b4a38955b90d77146cff45f0f23f489e56fc1ba824d6c8040a

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