Malicious PDF — malware analysis report

Static analysis result for SHA-256 118f0c44539fb03c…

MALICIOUS

PDF

81.4 KB Created: 2021-03-27 18:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bdcd1c0f81da6e3cf8ebab3e9d0c00a8 SHA-1: 10ca20963fc5ac89d2f5da66493e4684649f53f5 SHA-256: 118f0c44539fb03c9cf73789375ecfa3804a28100fd55df66094c558493510ca
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains keywords related to game downloads, suggesting a lure for potentially pirated software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/wix?keyword=governor+of+poker+2+apk+unlimited+money PDF link annotation
    • https://cdn.sqhk.co/kupibetefuko/hcij44W/color_wheel_lesson_middle_school.pdfIn PDF document text
    • http://businesshelpservice.com/information_technology_salary_philippines_20202gejf.pdfIn PDF document text
    • http://silkhfig.bid/inequalities_word_problem_worksheet_kuta_softwarejy5wp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455916/normal_603d4aacd53f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417032/normal_5ff336de31bef.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/iedmhhf/bugs_bunny_costume_kid.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluniziwav/gidTBih/68269792115.pdfIn PDF document text
    • http://luminar2-download.xyz/kenotozozeguduvarajakhgrt5.pdfIn PDF document text
    • http://marketitaly.info/43109637838jga0z.pdfIn PDF document text
    • http://aires.fun/cv_template_google_docs_freeabqmd.pdfIn PDF document text
    • http://srakan.space/dinghy_meaning_in_urduwlon4.pdfIn PDF document text
    • http://nasporte1.fun/asus_z97-a_bios_chipip2wq.pdfIn PDF document text
    • http://iceteas.space/lisuminvbndo.pdfIn PDF document text
    • http://shop-kid-toys.online/71071814834j8f2j.pdfIn PDF document text
    • https://cdn.sqhk.co/sibamoxa/gjbcghz/sodalateganux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/shola_aur_shabnam_movie_song_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/fuwakidifinaki.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/rigefizukupigagepexobudev.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/maai_teri_chunariya_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/21325052047.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/jopaxarugofuzobasavages.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_off0000f0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B7 5396 bytes
SHA-256: 47930e64d8faea0b444f5fe29eb48a6575503da51d5a3bfd219efabf7ac47e7f
font_01_sfnt_off00010318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10318 16492 bytes
SHA-256: af39bcf840ea871a5c9e400eda7011a2d430cc146494724d1adaf258e0faa428

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