Malicious PDF — malware analysis report

Static analysis result for SHA-256 3561e9727d165a81…

MALICIOUS

PDF

85.7 KB Created: 2021-03-19 19:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f48567dc541425233e7b24a24dc61502 SHA-1: 4ec92d039af7df8a031c5d73b0bc1fffe0f055d9 SHA-256: 3561e9727d165a81ba5b28d8daf6744610b2408049c9e06c0ff038148a87fd99
204 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating a malicious phishing and link farm attempt. It utilizes SEO redirectors to obscure the final destination, with the primary malicious URLs being 'https://midufefew.ru/wix?keyword=raymond+holliwell+11+forgotten+laws+pdf' and 'http://saxobupazes.sportsontheweb.net/how_old_are_the_riveras.pdf'. The presence of a 'Download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/wix?keyword=raymond+holliwell+11+forgotten+laws+pdf PDF link annotation
    • http://saxobupazes.sportsontheweb.net/how_old_are_the_riveras.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/66692994829.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/vans_old_skool_platform_white_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/qhgJ8uG/usa_most_listened_radio_station.pdfIn PDF document text
    • https://cdn.sqhk.co/retirijozi/gPJfThe/pregnancy_week_by_week_growth_chart.pdfIn PDF document text
    • http://vexizudu.medianewsonline.com/calligraphy_worksheet_free.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/bisiku/burinemizoxerurixajazi.pdfIn PDF document text
    • https://e79dab91-b8ca-4f03-a7cf-74564eaa1d8a.filesusr.com/ugd/009cd4_cdb689ef8c6b4e818d0111e3c1172c2a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/fl_studio_producer_edition_20.0.5.91_mac.pdfIn PDF document text
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_ff46f2bc2a1d45a98a856211ce5c5c9d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/ayumilove_maplestory_2_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/vexega.pdfIn PDF document text
    • http://wewamamewiler.atwebpages.com/online_to_ppt_converter_without_email.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/toto_africa_piano_sheet_music_boss.pdfIn PDF document text
    • http://fonenutekosut.epizy.com/coronary_artery_bypass_graft_surgery.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/rutilibiw.pdfIn PDF document text
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_84063835116a445781b3a3eb1df0e93b.pdf?index=trueIn PDF document text
    • http://kubozivomojiva.epizy.com/ganek.pdfIn PDF document text
    • http://molulig.epizy.com/wipunov.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/bootstrap_simple_website_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/jugapufesipone.pdfIn PDF document text
    • http://jubalagifagusop.epizy.com/nagukoke.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/78333987687.pdfIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_b08659ad58bf4018a45367d9e342500a.pdf?index=trueIn 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_off00010d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7D 5708 bytes
SHA-256: 02028ef9479b127e71c87ccce871eee933473413d0e6a212c1dae202c722d58e
font_01_sfnt_off000120f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F2 12228 bytes
SHA-256: c2461b03da8c35d2d21e451ee6f7a9b7979c43a5884a940af9927ee777961224