Malicious PDF — malware analysis report

Static analysis result for SHA-256 2029ba982ae05d95…

MALICIOUS

PDF

82.6 KB Created: 2021-04-02 22:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5df4d0a7abbc6065904b68a2dddd1c9a SHA-1: d1703fead4e4936c4ad60116b5663b5f747dbb7e SHA-256: 2029ba982ae05d959f848241bf5b0a0997856bf78bb3cb28af89873f461a9b4e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, forming a link farm designed to appear as legitimate search results. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • 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.
  • 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://soxebez.ru/wix?keyword=chia-ying+lee+married
    • https://dutofubexel.weebly.com/uploads/1/3/4/6/134631161/ferakatotuzupi.pdf
    • https://cdn.sqhk.co/babonisu/fhdjiv6/86532637351.pdf
    • https://rinilevewabidu.weebly.com/uploads/1/3/1/3/131382630/kuxoz.pdf
    • http://bogplaktnc.fun/taridijitovupitusc2q6.pdf
    • https://rurezakofone.weebly.com/uploads/1/3/1/1/131163981/99b36d5.pdf
    • https://jatitebomotopoz.weebly.com/uploads/1/3/0/7/130776336/d18031c16aea.pdf
    • https://cdn.sqhk.co/felinavaw/hdhhjdT/toon_blast_cheats_no_survey.pdf
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/3876129.pdf
    • http://fuposipavelolug.iblogger.org/7666532536.pdf
    • https://cdn.sqhk.co/jeforije/bhfBghT/calendar_august_2020_template.pdf
    • https://jabibodusap.weebly.com/uploads/1/3/2/6/132681053/8805397.pdf
    • https://cdn.sqhk.co/letareximo/aZhjjam/rozodavokopetovuse.pdf
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/rivegadil_mififame_zojad_jozifujitonuloj.pdf
    • https://nekekijubexofus.weebly.com/uploads/1/3/4/5/134587401/netazoweroxofi.pdf
    • https://ramasiwo.weebly.com/uploads/1/3/5/3/135390431/finubodo.pdf
    • https://lilugotowo.weebly.com/uploads/1/3/2/7/132711957/perexivej.pdf
    • http://lunamawel.22web.org/mudize.pdf
    • https://junezafebu.weebly.com/uploads/1/3/0/8/130874287/lenejilebopidaxu.pdf
    • http://kapusta.pro/wumoganazedenebibazekadete63x7.pdf
    • https://maduvifodowemo.weebly.com/uploads/1/3/4/6/134692972/9836815.pdf
    • http://stroy-level.ru/ncert_books_full_formp9f01.pdf
    • http://vsspb.ru/world_conqueror_4_modern_war_mod_apks4a73.pdf
    • https://rubuxunixo.weebly.com/uploads/1/3/4/5/134518382/6980189.pdf
    • http://arevakar-travel.com/venudupideraturokaj4z6q.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vibanizudapitik.epizy.com/63152864345.pdf
    • http://nimitijas.rf.gd/34020409387.pdf
    • http://puzasapexuwuju.epizy.com/76584620740.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000ecf5.bin
364044bad7ffde011f6b156a008360b19eb5b427ba0128f54416d7a20a107538		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xECF5 6208 bytes
font_01_sfnt_off000101d8.bin
a974633fd9061caa23808faf1bac06d6dc821da97ff197d9d5ecfa01e479f4a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D8 5100 bytes
font_02_sfnt_off00011312.bin
5ab6b88823a088930fbaba155c8cad701e36b892ed3104f109acad1026207a9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11312 11556 bytes

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