Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7c37f0b739b84c…

MALICIOUS

PDF

79.6 KB Created: 2021-03-29 23:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 17f31b399a49301e167c967a362f8386 SHA-1: 4ca946819b0b8b5b58b5f983d4bb7b53cf80072e SHA-256: ac7c37f0b739b84c45195d9ddc65b0a95eda9d86af6ce192232da4b02fa2bd5f
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, suggests a lure related to camera reviews, while numerous embedded links, including one to 'punejew.mygamesonline.org', point to a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of numerous external links suggests a potential for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://punejew.mygamesonline.org/82384093791.pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4487903/normal_5fc85e8f8b738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413975/normal_5fd23338de1eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_5fe6d35bce1d6.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/54231866168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_603a856f3307b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_6046782d850d3.pdfIn PDF document text
    • http://gumazesetijub.iblogger.org/magifisidixupofuzunogatul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5ffb19f70269f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490367/normal_5ff1fb696a239.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/mO-5lVq97NI/wb?keyword=nikon%20d5600%20dslr%20camera%20reviewsPDF link annotation
    • https://s3.amazonaws.com/jinabom/11246957686.pdfIn PDF document text
    • http://davixajo.rf.gd/the_rational_male_arabic.pdfIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_d65ed586640c4f6c9f1d4cc631859faf.pdf?index=trueIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_9f4fbd50be23475489120f7af7864a2e.pdf?index=trueIn PDF document text
    • http://lamekukibudinos.epizy.com/6086126068.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/arranque_significado_informatica.pdfIn PDF document text
    • http://tobikinos.onlinewebshop.net/jadutifazolilavafa.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/free_brochure_template_ai.pdfIn PDF document text
    • http://kujazidi.epizy.com/punabate.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/get_your_guide_iceland_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/alarm_clock_sound_app_android.pdfIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_afd2a377df6e45db9e509afa44c83f90.pdf?index=trueIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_a1f154a5a04a451cb029dd90af170129.pdf?index=trueIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_93d20ed040fe4259a7f8c7ba073b708b.pdf?index=trueIn PDF document text
    • http://puwagof.rf.gd/astronomy_software_for_android_phone.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_off0000f9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D0 5688 bytes
SHA-256: 0d63fd1287b1c623907cd958a1209548ca112315111ae2231d1ea45fff68443c
font_01_sfnt_off00010d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D35 10540 bytes
SHA-256: ccbe58110e385c9d7677436f42dd749534202d5c065f47419438ba0644c452e5