Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f83e2a0e3eb989…

MALICIOUS

PDF

89.3 KB Created: 2021-05-07 18:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e5a3ca3f17989a349237da65bcb91d6a SHA-1: ea16a3034eb7965c55b402d6ab623e168a7a7b09 SHA-256: 92f83e2a0e3eb989bb41b7ee98e1654a2f758af96614834d3a712e876adfc666
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains references to 'Beats solo 3 bluetooth headphones' and includes numerous embedded URLs, suggesting a lure to a malicious site. The presence of external URIs and link farm heuristics further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=beats+solo+3+bluetooth+headphones PDF link annotation
    • https://tapukupe.weebly.com/uploads/1/3/4/7/134717462/356771.pdfIn PDF document text
    • https://sejimewopokotas.weebly.com/uploads/1/3/5/3/135350214/0828c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402261/normal_606a175d424de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_606d62fd89cb9.pdfIn PDF document text
    • https://futibiwis.weebly.com/uploads/1/3/1/4/131408183/4086687.pdfIn PDF document text
    • https://muwirejevom.weebly.com/uploads/1/3/1/8/131857435/zapasusipetenaliba.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/bjfhh3A/airtel_prepaid_recharge_coupons.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493891/normal_604354f5dea68.pdfIn PDF document text
    • https://kopiwuzurori.weebly.com/uploads/1/3/1/3/131398237/ramomevuvitix.pdfIn PDF document text
    • https://navowilupaxit.weebly.com/uploads/1/3/1/3/131381067/jujilazog-nigisi-divafazozojevad.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/jfgdG2p/97120324084.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_5ff770aa27b9a.pdfIn PDF document text
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/bolobuxuxewu-pifegonulo.pdfIn PDF document text
    • http://wojesukuzak.mygamesonline.org/bozirulijoxufozuxonanalet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388178/normal_606ea70b23b4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409103/normal_6003888835d49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411931/normal_5ffcd3e85e255.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/3jfjezi/kufetamukune.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/mebipawusesu.pdfIn PDF document text
    • http://tidirakozodawon.getenjoyment.net/39445514132.pdfIn PDF document text
    • https://zaderurumanig.weebly.com/uploads/1/3/4/5/134588260/8a6761bfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475203/normal_603ce8e096e99.pdfIn PDF document text
    • https://naxofezuwu.weebly.com/uploads/1/3/5/3/135396878/ruzabiribugotu-gixanela-gijebeka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/all_caste_list_in_maharashtra_in_marathi.pdfIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/mcculloch_pro_mac_610_chainsaw.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A30 5304 bytes
SHA-256: 20e08fad522108bb2771e23801d90ccb3d15de2cd9e7a1c9af31809ef5c83450
font_01_sfnt_off00011c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2E 11244 bytes
SHA-256: bf5dcf42b29052cefef74d3f2782ebc613749d494565c9e3273ee86dff2d7317
font_02_sfnt_off0001426e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1426E 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8