Malicious PDF — malware analysis report

Static analysis result for SHA-256 d574d8f4733814d5…

MALICIOUS

PDF

80.3 KB Created: 2021-03-13 17:33:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7bb1ce14ae7a32f85d5492ab064c92b6 SHA-1: 39b9e61dd6a569949413b8ce37844d0fe78f18cb SHA-256: d574d8f4733814d59fda7d0af7ccda043ef8ba3217686093c04b8c3c336179e5
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to disposable domains and are presented as part of a link farm. One high-severity heuristic indicates an invisible link to a suspicious domain, likely intended to trick the user into clicking it. The document body, though heavily garbled, contains text related to 'Alex rider stormbreaker chapter 1 summary', suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://fokemale.ru/aws?utm_term=alex+rider+stormbreaker+chapter+1+summary PDF link annotation
    • http://zomaragexavope.sportsontheweb.net/why_are_radial_arm_saws_no_longer_made.pdfIn PDF document text
    • https://winenexosipagep.weebly.com/uploads/1/3/2/8/132814343/032282f68.pdfIn PDF document text
    • http://50offstore.info/iomega_home_media_network_hard_drive_windows_10yvy0g.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/how_to_manage_stressors.pdfIn PDF document text
    • http://imm-shoes2.club/lewiviledakemixvhv.pdfIn PDF document text
    • http://revershjtb.site/92911366937ke6lq.pdfIn PDF document text
    • http://lnstagram-support.live/determiners_worksheet_for_class_6_with_answersygity.pdfIn PDF document text
    • https://farejebizaf.weebly.com/uploads/1/3/0/8/130815013/e6d1ae10657.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/vepogawomesixakazupowogu.pdfIn PDF document text
    • http://idealica-italiaoficial.site/generals_gathered_in_their_masses_star_warso62j3.pdfIn PDF document text
    • http://topstop.site/how_to_understand_science_subjectsoxpno.pdfIn PDF document text
    • http://micrometer25bill.site/curriculum_vitae_formato_europeo_word_scaricaouzei.pdfIn PDF document text
    • http://usacreditscore.info/12954433369k0eau.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/4901772733.pdfIn PDF document text
    • https://pitefomut.weebly.com/uploads/1/3/2/6/132682610/wamif.pdfIn PDF document text
    • http://subbellassecret.com/everfi_module_9_quiz_answers_quizletkvkcl.pdfIn PDF document text
    • http://meetcabinets.xyz/ntr_aradhana_video_songs1pxx5.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/90083977241.pdfIn PDF document text
    • http://fuxanujibiz.mygamesonline.org/93388145814.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pojozija.onlinewebshop.net/41694807584.pdfIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_12988f19613e413087d7f00796f68d88.pdf?index=trueIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_f218dd24837d42548a763c79bcbee785.pdf?index=trueIn PDF document text
    • http://xuvuzonixo.onlinewebshop.net/53989786941.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_off0000f910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 5728 bytes
SHA-256: 7cb6ebba45808618c56a5dd925c6ea3943447e2075443aea5474555d1ef17787
font_01_sfnt_off00010c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C75 11028 bytes
SHA-256: 99dc295d3fa5eac83a7237543101824799a074055e755af858645566edc58c1e