Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd414e6df60585f2…

MALICIOUS

PDF

77.0 KB Created: 2021-04-26 00:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bae432dedb217515d5947652202a551 SHA-1: dd0de59555357edaf771c52f85cd6540f86ad714 SHA-256: cd414e6df60585f2d17746dffda29cfae35363dff83064d2eeeb6faa1747e000
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, specifically pointing to 'https://vilenefex.ru/strik'. The document body, though heavily obfuscated, contains text related to 'Dungeons and dragons player's handbook 1st edition', suggesting a lure to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=dungeons+and+dragons+player%2527s+handbook+1st+edition
    • https://cdn-cms.f-static.net/uploads/4420752/normal_6058a065e26d3.pdf
    • http://fulifubajamo.mywebcommunity.org/48060317083.pdf
    • http://lirebuwoke.mygamesonline.org/buzujafugiwexejuxevikap.pdf
    • http://kefojixesopu.66ghz.com/contagem_de_coliformes_totais_e_fecais.pdf
    • http://wizudaneku.iblogger.org/dun_and_bradstreet_report.pdf
    • https://cdn-cms.f-static.net/uploads/4471236/normal_602f26d442c45.pdf
    • https://cdn-cms.f-static.net/uploads/4465255/normal_600ead11cbbc1.pdf
    • https://static.s123-cdn-static.com/uploads/4485310/normal_5fe577661c997.pdf
    • http://gowanenutik.mypressonline.com/91966414008.pdf
    • http://revilokepudidu.mygamesonline.org/pwc_uk_annual_report.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/55e6404d-a43a-420f-a4c7-145bf341e992/dewukosixigikamubiwonaxiv.pdf
    • http://jaxududopute.epizy.com/73609828210.pdf
    • https://uploads.strikinglycdn.com/files/58528efa-8b30-4f7f-9c1c-497322e3bc98/xekeradutitutu.pdf
    • http://bagomilovop.epizy.com/manual_of_aphasia_therapy.pdf
    • https://s3.amazonaws.com/nolarifaforuxop/6507908569.pdf
    • http://suzumusazudub.epizy.com/xilodedurebesigewato.pdf
    • http://bidusibebawuz.onlinewebshop.net/bidofesopi.pdf
    • https://uploads.strikinglycdn.com/files/b9b74d08-6f3b-48ec-8002-c416e79e8a7c/does_ahsoka_tano_come_back_in_clone_wars.pdf
    • https://s3.amazonaws.com/vavapekadoliti/smart-ups_1500_rm_replacement_battery.pdf
    • https://uploads.strikinglycdn.com/files/f9f1999b-8e30-43d8-a61a-feb6afb9e776/87525554039.pdf
    • https://s3.amazonaws.com/selivuvumepaveb/polaroid_white_rainbow_sx_70_camera_with_flash_bar.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba7.bin
fc8e3d962d89158f259629e5790780a8b4587270b70d9180db6303fb555e5fff
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 5612 bytes
font_01_sfnt_off0000fed5.bin
aac779b7dc2e7aa95b0a0af1ba9907808af360602029fe6c8276c230608a4b57
pdf-font-stream PDF embedded font (sfnt) at offset 0xFED5 11688 bytes