Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d16902930fea6c…

MALICIOUS

PDF

86.7 KB Created: 2021-03-09 16:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 23a247152a84d574911e2295242daed3 SHA-1: b9ddb43a1461322fc86c69640e3ea48ee2830182 SHA-256: e6d16902930fea6c7f3bfb6327b8b4c60a02deb9a30e2e94c8fb6b15e800bdec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://vilenefex.ru/wix?keyword=asi+se+dice+level+1+textbook+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389816/normal_5ff54e115e0cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414687/normal_6005aa6b7ba8b.pdfIn PDF document text
    • http://losozotime.22web.org/31217569074.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/the_love_dare_day_by_day_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451377/normal_600cf679a0c2c.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/83082647592.pdfIn PDF document text
    • http://nadipewin.mywebcommunity.org/que_significa_orando_en_el_espiritu_santo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_600a8790946ff.pdfIn PDF document text
    • http://jegagavakunumog.iblogger.org/the_twits_roald_dahl_book_review.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/gegominufaxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464072/normal_603f6464c9220.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://488c2ff9-9ff4-499e-8f11-525115e20b22.filesusr.com/ugd/8aba0c_f71e1eaf2401422baf6da3ad0f91212f.pdf?index=trueIn PDF document text
    • http://topuwagib.epizy.com/12_inch_star_template.pdfIn PDF document text
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_2c27debe7fe34bcd9bb44d5cb3c0a886.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/44cefd16-9e9c-4d49-9d62-3ffdaa86c0b0/nesco_american_harvest_food_dehydrator_and_jerky_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dccaa88e-45a5-42d2-a1fd-e809bd3893c2/what_does_the_word_b_mean_in_slang.pdfIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_27247704f95b43efb650e12572b503aa.pdf?index=trueIn PDF document text
    • http://lefadubofow.rf.gd/narrative_report_on_national_earthquake_drill.pdfIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_334221c990e24b1ca9e67e5df951831a.pdf?index=trueIn PDF document text
    • http://wilaroxu.atwebpages.com/73845268262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa56193b-a892-453a-a251-27a398f3023f/visefarutisaxarepu.pdfIn PDF document text
    • http://bapinusajix.rf.gd/coliform_bacteria_count.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1df05de-d5a7-497b-835b-6316d2cfdf87/porolefatopiraxubudorej.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36C 5632 bytes
SHA-256: 912e1e078c5f98107f668e10bd9eb144b4f32fc775090cc322ced8ab23ea1e47
font_01_sfnt_off0000f6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D7 5188 bytes
SHA-256: d525fa7ca76746aefe4d19ac3918c923a39e74ee8147d99cd66380907ae4c8fb
font_02_sfnt_off00010889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10889 6068 bytes
SHA-256: d2d10b6b0c668cf26faa9347c7054f8580c7eefa5cb7aecda2a4fba74bd025f0
font_03_sfnt_off0001183a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183A 11092 bytes
SHA-256: d590b23a111eb0700ed331de538f8422fde6517cb3925560b22c67e77640b853
font_04_sfnt_off00013e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E29 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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