Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af7c6745aafff00…

MALICIOUS

PDF

63.2 KB Created: 2021-02-17 00:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 468936fc20da1613dc8b716cfd3d8ba3 SHA-1: d68fe824994bad00756bbba14df552133e1b66c8 SHA-256: 5af7c6745aafff005a4315f34c0f34213dc112404267774b068763c630c53d54
264 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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.
  • 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://crophysi.ru/aws?utm_term=d%2526d+5e+god+of+wisdom In PDF document text
    • https://nudezodubazez.weebly.com/uploads/1/3/1/1/131164524/tegibumenem.pdfIn PDF document text
    • http://dasonudulikuvon.22web.org/88570187114.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/7160ff28c12.pdfIn PDF document text
    • https://karoxenerom.weebly.com/uploads/1/3/0/7/130739074/3601274.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/hfiggic/mejamo.pdfIn PDF document text
    • https://geduletulaf.weebly.com/uploads/1/3/4/5/134509924/4565183.pdfIn PDF document text
    • https://nitevugumosu.weebly.com/uploads/1/3/4/5/134526644/lujawixez.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/hjBchbM/jusolesinonunobapuragigip.pdfIn PDF document text
    • https://cdn.sqhk.co/senaveduwiz/r2ifghh/pocket_rally_lite_mod_apk_rexdl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://menumizumiwasij.rf.gd/1109777706.pdfIn PDF document text
    • http://baxirogujugiji.rf.gd/31053244112.pdfIn PDF document text
    • http://lobaman.epizy.com/50210324717.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/zegeninun.pdfIn PDF document text
    • http://wetetepipemo.rf.gd/zabubene.pdfIn PDF document text
    • http://mivowejow.rf.gd/cheekh_episode_16.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_off0000bff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF5 4156 bytes
SHA-256: 58eabb24298f18ab3cb5c3f3a5652a185830994b36fd37cd9ad46fcf77495092
font_01_sfnt_off0000ce24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE24 10116 bytes
SHA-256: 666cbf2b6d9428e67c396a416493a304d201ce3268e01ce54d8525ec2493842e

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