Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1d40ebd68eb6b0…

MALICIOUS

PDF

79.1 KB Created: 2021-03-30 18:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0fb32cf6b18ee46d6260ade5b1abf42b SHA-1: d3230fd53d0a7ea2a54b03fd46cd47e9edf9bebc SHA-256: fe1d40ebd68eb6b03c2bf41936941d0434e638a0f5b42f4c6e5c530c2eca3e3f
194 Risk Score

Malware Insights

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

This PDF file contains a link to a redirector that ultimately leads to a download page for cracked software, identified by the 'roehsoft ram expander cracked apk free download' keyword. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into downloading potentially harmful files.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://crophysi.ru/wix?keyword=roehsoft+ram+expander+cracked+apk+free+download In PDF document text
    • https://rujunile.weebly.com/uploads/1/3/2/7/132710621/bb6a6e5.pdfIn PDF document text
    • https://xumexutibivuw.weebly.com/uploads/1/3/2/6/132680998/4877595.pdfIn PDF document text
    • https://cdn.sqhk.co/sirojenu/Jjj8XgR/81458059173.pdfIn PDF document text
    • http://jolovomolosubi.getenjoyment.net/blood_pressure_scale.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/how_much_do_reiki_practitioners_make_canada.pdfIn PDF document text
    • http://vasizazesunof.medianewsonline.com/ferikalebisanef.pdfIn PDF document text
    • http://fesurowejo.mywebcommunity.org/6.0_powerstroke_s400_turbo_kit.pdfIn PDF document text
    • http://bidetoluji.getenjoyment.net/video_games_history.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/how_to_use_samsung_activewash_aquajet_vrt.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/f0VDy5F/pukoperepomibepebopur.pdfIn PDF document text
    • https://cdn.sqhk.co/jedepazisu/igYZHa8/metaphysics_definition_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/jiOjegf/falling_lyrics_trevor_daniel.pdfIn PDF document text
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/3ce81bd529f6d.pdfIn PDF document text
    • https://cdn.sqhk.co/rawuredilu/6TKQjdR/mifeximem.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/47567008944.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/jubiferekaka/92177455006.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/poxepurakunorowak.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/lupekofoz.pdfIn PDF document text
    • http://xarilupinedup.myartsonline.com/metamorphosis_in_lepidopteran_insects.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/tilray_earnings_report_date.pdfIn PDF document text
    • http://guriseb.myartsonline.com/septic_arthritis_adalah.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71B 5624 bytes
SHA-256: 14be859b2f74253f0457d1d1415ec839257b83885094ff66ac3dc18ca5420ec1
font_01_sfnt_off0000fa1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1F 3276 bytes
SHA-256: 3ae70120476bece1aed9dc790b5f8ca295b493a0f728ea5055865847b53edc17
font_02_sfnt_off000105f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F5 11328 bytes
SHA-256: 4281603c24cec34574acd509e48a3783031b2559cc6e611f0791a518c9e553cf