Malicious PDF — malware analysis report

Static analysis result for SHA-256 95bd26fff529787e…

MALICIOUS

PDF

80.5 KB Created: 2021-05-10 06:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: eed9a9b13051df6886d93218b46a86a9 SHA-1: eba707887eb12a529e7a4e996f227937e2f58e51 SHA-256: 95bd26fff529787e7736a9625bb636d3d17f43d54dd78d9565d00763ca99ed72
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/strik?utm_term=ariel+sylvia+plath+book+depository In PDF document text
    • https://cdn.sqhk.co/fisejadiruw/igmyGjj/94331221392.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/7148984100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465701/normal_60200ac1303b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479917/normal_60476ce77dbcc.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/h5ijYhd/marvel_s_runaways_season_2_episode_7_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/gjaqhjE/nokozalotafimakosojawara.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/asmedia_asm1083.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/ZsLgeie/38153119777.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulelenuvi/LXhejas/97591388050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450038/normal_606796f54e863.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/pibabopuduj/96022565967.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/rudaxenapupepujinakonuzig.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/13104454247.pdfIn PDF document text
    • http://kitilogokufalu.atwebpages.com/zelufusesikasugir.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/doxil.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/sozejot.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/68776079948.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/psoas_sign_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/23472084033.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/95341113977.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/500189398.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/wixima.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/year_3_english_worksheets_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/6269384367.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_off0000fa50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA50 5400 bytes
SHA-256: 221010aa90ca16e4d7c1174fd6bec9ad6537e220c7871f63f2350891edcd5de9
font_01_sfnt_off00010caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAA 12132 bytes
SHA-256: 3496ced5b3b4aa7e02046075e56ae670ccfbe5e0d7588371b0e9d9fae60430c0

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