Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b7bbbb81f99f04…

MALICIOUS

PDF

70.2 KB Created: 2021-02-12 09:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 287660a338c238ff748a62e49382e634 SHA-1: 46f6cdef0ffd1965ef211f6de9cd1270d3b50b14 SHA-256: 27b7bbbb81f99f04d4dc0890e3c2a7a0a242626f3b65ce321ab39754b815af7c
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution attempt. The document body, though heavily obfuscated, contains references to 'Fifa 14 mod apk 2020', suggesting a lure for potentially unwanted software. Numerous external URLs were extracted, many pointing to disposable hosting and acting as a link farm, with a primary URL leading to a FIFA mod APK download. No scripts were extracted from this sample, but the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

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://seumenha.ru/123?utm_term=fifa+14+mod+apk+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408995/normal_601cb8be8e7ab.pdfIn PDF document text
    • http://pusosokus.iblogger.org/amplifier_app_for_android_phones.pdfIn PDF document text
    • http://bobejitamatu.iblogger.org/allavsoft_video_er_full_version.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368953/normal_6007cd9bb1cfa.pdfIn PDF document text
    • http://rubeatyshop.xyz/free_blog_templates_for_teachersf49np.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/jijZ8dC/ditixozutola.pdfIn PDF document text
    • http://tur8osale.site/706958323897v0jw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481058/normal_60247e52d9c37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jimibidubarabus.epizy.com/another_word_for_tour_guide.pdfIn PDF document text
    • http://ribaxekag.epizy.com/angular_formcontrol_select_options.pdfIn PDF document text
    • http://tidomag.epizy.com/kasoguninosedaliwot.pdfIn PDF document text
    • http://jusarim.epizy.com/l_blends_sentences_worksheets.pdfIn PDF document text
    • http://nanaxaj.rf.gd/93444629348.pdfIn PDF document text
    • http://nuvujudidasutem.rf.gd/spreadsheet_for_household_expenses_uk.pdfIn PDF document text
    • http://nupadamemal.epizy.com/banner_saga_2_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D6 5316 bytes
SHA-256: 2c01ce047dfc8d347184f8664482eedda9419f9b32934ad9386a6da95a73043e
font_01_sfnt_off0000e7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F0 10636 bytes
SHA-256: f36d0232fe699e99caa9eaeaecb0efcf13fe6f30a801e0faaa9023406ad16419

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